Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). Primary tube length: approximately 31.00 inches The engine compartment of this concours Catalina is beautifully finished. Learn how Classified Ads works . The rod weighs 751 grams versus the stock rod at 958 grams. Brand: Crower PN 60311, solid Standard ratio with the 400 was 3.55:1(except 3.36:1 in Firebird for 1969) regardless of transmission(3.23:1 for cars with air conditioning). It shared the 389's 3+34in (95.3mm) stroke, but its bore was 3.78in (96.0mm) for a displacement of 336.66cuin (5.5L). SPECIFICATIONS. He thinks the stock exhaust flow of 180 cfm will suffice for this build. The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. Are you thinking of buying a 2007 muscle car, or any other car? Cam was a #541596 McKellar No. The last "true" Pontiac V8s, a 265 and 301cuin (4.3 and 4.9L), ended production in early 1981. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". Royal Pontiac's engine swap wasn't a new trick for Pontiac. The Pontiac 2+2 featured a 6.9 L V8 engine, heavy-duty front springs, dual exhaust and distinctive exterior body design. Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. Sponsored Stories . It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Preparation: Install in rod, torque, measure ID Primary tube diameter: 1.75-in Vacuum advance: Not usedEXHAUST The two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. This same camshaft was also used in Pontiac's 19691970 RA IV production cars. The 2+2 package was first offered as a $291 option on Catalina hardtops and convertibles in 1964. Though never factory-installed in any car, the ultimate engine of the Ram Air line of engines was the tunnel-port Ram Air V. In 1969 Pontiac created four versions of the Ram Air V engine: a 303cuin (5.0L) short deck version for SCCA Trans-Am racing, a 366cuin (6.0L) variant for NASCAR, a 400cuin (6.6L) version for street use in GTOs and Firebirds, as well as a 428cuin (7.0L) adaptation for drag racing. Centerline: 110-deg Rocker arms: Crower roller, 1.6:1 Piston pins: Icon, SAE 1016 to 1022 [11] By mid-1978, the W72 could no longer be ordered in conjunction with the MX1 3-speed Turbo-Hydramatic 350 automatic transmission, and could only be ordered with the 4-speed manual transmission. The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. The short-deck block and different intake ports also required the design of a new intake manifold. Thus, the quest to find 100 hp in a 421 started on the flow bench, before a wrench or machine tool touched any part of the 49-year-old engine. As Pontiac still wanted to offer a performance motor to compete in the performance market, they looked back to the 400 Pontiac and how it could be improved to offer greater performance while meeting CAFE standards. pontiac engine decoder year code c/i hp tran carb car misc 1962 13b 421 3 m 2 x 4 full super duty 1962 13u 421 4 m 2 x 4 full super duty 1962 bu 421 4 m 2 x 4 full super duty . He says the Tri-Power setup modified with the addition of the larger '66 center carb will flow 1,050 cfm. Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. Ram Air induction was optional in the GTO, though power ratings were unchanged. Brand: Fel-Pro head and intake/ SCE pan and timing cover Crower identifies this cam as a Level 4, which means it provides strong midrange and top-end power for heavily modified engines. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. The XS-code 389 was still rated at 360bhp at 5,200 rpm, same as the more common WS-coded Tri-Power 389, but performance was noticeably improved on acceleration runs. View the Pontiac Engine Torque Specifications for engine repairs and rebuilds. Lobe separation angle: 112-deg Chamber: Closed, special to PMD, 70 cc 1. So large are the intake ports that the pushrods run through the center of each port via pressed-in tubes, in addition to streamlined airfoils over the tubes themselves to improve port shape, and increase flow velocity. True Pontiac engines were designed and built in Detroitnot on a computer, but often by GI-bill-educated engineers who grew up working with their hands and now had a slide rule in their pocket instead of a greasy rag. 1966: 421: 9782611 (late) 1967-1969. It had 2-bolt main bearing caps in 1969, but went to a block similar to the Ram Air IV's in 1969 that was drilled for 4-bolt main bearing caps (but used a cast crank and cast rods). Rings: LPC (Liberty Performance Components) premium moly, standard tension Pontiac V8 Engine Tune Up Specifications. 400 Ram Air (1969) / Ram Air (1970), aka Ram Air III, Learn how and when to remove these template messages, Learn how and when to remove this template message, "Tested: 1968 Pontiac GTO 428 / Royal Bobcat", "1969 Pontiac Grand Prix 428 specifications | technical data | performance | fuel economy | emissions | dimensions | horsepower | torque | weight", "Muscle Car Horsepower How Exaggerated Was It? The camshaft was also revised to have a slightly higher duration, the carburettor jets tuned and a dual exhaust was implemented allowing the power to increase to 220hp (223PS; 164kW) at 4000 rpm and 320lbft (434Nm) of torque at 2800 rpm. NASCAR race cars embody the muscle car philosophy of power. [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. Torque: See Part 2 Federal emissions standards and the drive towards "corporate" engines shared among all GM divisions led to the progressive demise of the Pontiac V8 through the late 1970s. The Block Date Code represents the production date of the engine. This was underrated at 330hp (246kW). When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. However, the 1959 389 engines had the generator in front of the heads with reverse flow cooling still in use. Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in With higher compression and dual exhaust it produced 280hp (209kW) for 19631964, and 285hp (213kW) for 1965 through 1967, its final year. [19] The cylinder head design is similar to the Ford FE tunnel-port head used in the GT40 and Can-Am series racing. For the 1967 GTO the engine was rated at 360bhp (268kW; 365PS) and had the cast-iron headers. Oil pan: 8-quart with extended pick-up, fabricated retention clamp Valves: Competition Products stainless steel, 1.92 /1.66-in A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). A total of 1,808 Ram Air IV production cars were built over its 2-year production. Unique exterior features included "2+2" badges, twin lens taillamps, and chrome bodyside gills; Pontiac's famous eight-lug aluminum wheels were the ultimate optional touch. "Armasteel" was a trademark of pearlitic malleable iron developed by GM's Saginaw Metal Casting Operations around 1936, which was referred to as "locking ball" cast-iron, as opposed to the "flaking" type found in other engines. like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft. A panel covers the dash opening where the radio would have been on a standard Catalina. As a result, it was remarkably free of teething problems. Here are my top six rationales for admiring the 1966 GP. Math, not gasoline, makes horsepower under the hood of a Pontiac. The main upgrade for the engine was the ESC, (Electronic Spark Control)[15] which provided slightly more power at 170hp (127kW) with 4.9L (299cuin) for the 19801981 model years. What is important is the total timing, the . street engine. The 421 also marked the end of the option for a forged-steel crankshaft. Size cfm: Total flow, 1,050 cfm A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Optional engines included the 356hp Tri-Power as seen on our feature car (code WH manual or YJ auto), or the 421HO, rated at 376hp . Oil pump: . Pontiac's V8s share the same 6.625in (168.3mm) connecting rod length, with the exceptions of the later short deck 301, 265, and 303 Ram Air V. Most Pontiac V8s had an overall length (to the edge of the water pump pulley) of 28.25in (718mm), an overall width of 27in (690mm), and a height (not including air cleaner) of 31in (790mm). The 421 Super Duty had been the first of these, and their large bore and stoke made them popular in NHRA and NASCAR competition throughout the '60s. Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. PONTIAC : 1965-75Tune-up Specifications : Year: Engine Car Model: Spark Plug Type (AC) - Gap: Point Gap: Dwell Angle: . With A/C On, Engine Hot: 421: 1966: With Tri-Carb, With Air Injection reactor: 45S: 0.035: Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. A common misconception made by enthusiasts was the notion that all Pontiac engine equipped Trans Ams featured the "T/A 6.6" decal on the shaker, however, it was exclusive to the W72 engine that was featured on less than half of all Trans Ams made during this period. Block casting # 9773157. Also bowing in 1967 was the new Firebird, which had the . Some production test cars ran considerably slower and yielded 14-mile (402m) times in the 14.5 second/98mph (158km/h) range in showroom tune (uncited sources)- results that are quite consistent for a car with a curb weight of 3,850 pounds (1,746kg) and the rated 290hp (216kW) SAE NET figure that some sources suggest was "under-rated." Specifications listing with the performance factory . This was the only Poncho with standard 421-cid power. Pontiac went to open-chambered heads in some 1967 models and all 68 and up to improve power, engine breathing and reduce emissions. The Pontiac 2+2 is a full size automobile that was manufactured by Pontiac, built on the B-body chassis.It debuted for the 1964 model year as a trim-only option for the Pontiac Catalina, with special door panels, bucket seats with a center console, and exterior badging.Pontiac marketed the 2+2 as the "big brother" to the popular Pontiac GTO.. Beginning in 1965 the name Catalina was no longer . superior_queens (3,035) 100%. The shaker wore the decals "455 H.O." SELLER Glendale, Arizona 85305. ][citation needed] T, While the exact total number of Ram Air V engines produced is not positively known, only about 25 303cuin (5.0L) engines were produced and about a dozen 428s and 366s. It was rated at 360hp @4300 RPM in the GTO and 370 @ 4600 RPM in the Grand Prix and other full-size Pontiacs. [9], The W72 engine was standard in all 1977 Pontiac Can Ams (bar the 1977 Can Ams sold in California/High Altitude states which received the L80 Oldsmobile 403) and was optional in all 1977-79 Pontiac Firebird Formula and Trans Am models. The 421 used the same 4.120-inch bore but used the 4.0-inch crank from the 421 it replaced. Based in part on designs for the "short deck" 303cuin (5.0L) engine designed for the 1970 racing season, it had a shorter deck than the big V8, and used thin-wall castings to reduce weight. This new material had stronger alloys in the iron. The Ram Air IV heads had 1/8" taller intake ports, larger intake port volume with more airflow, yet shared the Ram Air II round exhaust ports. engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . The most famous S/D of them all. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. ENGINE. Lift: 0.515/0.525 with 1.6:1 rockers This was to ensure there was enough fuel to cool the cast offset dished pistons. This was a completely stock car on loan from a private owner for the test. [citation needed]. Offered on select models from 1957 through 1966, Pontiac's Tri-Power induction system added a new dimension of performance to the General Motors brandand a colorful new term to the hot rodder's vocabulary. Keepers: Comp Cams race locks . or Best Offer. The consent submitted will only be used for data processing originating from this website. Compression Ratio: 10.6:1 effective Preparation: Weigh, soap-and-water wash The manuals had Hurst shifters. For 1970 the Trans Am was the only Firebird available with the Ram Air IV, and 88 were produced during the abbreviated 1970 F-body production run. "1966 Pontiac 2+2" Paul Stenquist. Laconic would be one way to describe this Pontiac's eBay listing, all it states is, "1966 Pontiac Ventura, 421 Tri-Power, 4 speed Runs/ Drives Great, Very Clean - Garage Kept".OK then, now you know what I know. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. Rod bolts or studs/head bolts or studs: ARP cap screw supplied in Howard's rods / PMDOILING SYSTEM In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm). However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. Displacement began at 287-cubic-inch (4.7L) and grew as large as 455-cubic-inch (7.5L) by 1970. From 1977 to 1981 there were 4 distinct 301 versions: For 1981 model year vehicles, the engine codes are the 8th digit of the VIN. Carb: (3) Rochester two-barrels PMD Seat pressure: 110 pounds at 1.600-in Email Email. It was renamed 428 HO for 1968. Whether all were installed in GTOs is unknown. It featured 3+14in (82.6mm) main journals (which the legendary Smokey Yunick reputedly left Pontiac's engineering department over). Along with proper parts selection, accurate machining and assembly are also important. Starting at the bottom, Jim will employ lighter and stronger parts in the reciprocating assembly, as evidenced by the choice of Howards billet rods and forged Icon pistons. With an identical bore and stroke of 4+116in (103.2mm) and 3+34in (95.3mm) it was precisely half the displacement of the 389 and shared numerous parts with the V8,[1] yet weighed considerably more than half as the engine lower half and block casting were not simply divided down the middle. Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. With the 1964-1967 Pontiac Catalina 2+2, Pontiac achieved a combination of power, road-holding, and fine styling superior to any other big Pontiac, and most of the competition's models besides. ft. After the SD-455 was certified with the new cam, it was production-ready but was then further delayed by the EPA mandating Pontiac recertify all of its engines when the EPA discovered that part-throttle emissions exceeded the limits. 1966 Pontiac Catalina Beginning in 1967 casting nnumbers moved to the rear of the block just behind cylinder #8 . Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. 1969 - 400 Ram Air III or 350HO Code 48. Greater throughput mixed with the proper amount of fuel and ignited at the ideal time for the flame to expand against the piston will result in more power. The Pontiac V8 engine is a family of overhead valve 90 V8 engines manufactured by the Pontiac Division of General Motors Corporation between 1955 and 1981. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. However, a few dealers would offer them in the GTO or Firebird and do their own installations, such as Royal Pontiac who offered the "Bobcat" conversion. Today, they have an average value of $430,000 in #3 (Good) condition, while the best in the world is worth about $550,000. A three-speed stick was standard; a four-speed and automatic cost extra. Update your shipping location. For the 1969 and 1970 model years it was the standard engine in both the Firebird Trans Am and the GTO Judge. Officially named the Quadra-Power 400 for 1967 and renamed 400 HO for 1968, the 400 HO was first offered for 1967 as the third engine in the GTO line after the automatic-only 400 2-barrel and the standard 400 4-barrel (the 400 HO would not be offered in the Firebird until the 1968 model year). 068) to 301/313 (No. The heart of the build, a code 45B 1964 421 HO 370 HP manual trans 4-bolt main block, all Pontiac 421 engines without exception had 4-bolt main caps. The goal of making a Pontiac Hemi succeeded but the engine was never produced. release the 421 V8 officially to the general public and the motor would continue to be available until the end of the 1966 model year. These motors were built mainly for NASCAR or other racing purposes and were equipped with all the extra racing goodies that people were looking for. For the truly obsessed, 16 Grand Prixs were built with Pontiac's 421 Super Duty engines, rated at a staggering 370 bhp. Pontiac offered this to the public as a streetable version of the 421 SD. More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. At the end of 1976, Pontiac was no longer able to continue production of the 455 (7.5 L) V8 motor due to the tightening emissions requirements. 301 4-barrel 'W72' or 'ESC' (170hp, 127kW) (with the 5th character of the VIN being a "W" for 1979-1980 and the 8th for 1981). In 1973 Pontiac started stamping extra numbers (1/4" tall) on their heads.These head numbers represented chamber sizes.They are usually stamped on the machined pads by the valve covers. In 1969, Pontiac unveiled its Trans Am model Firebird, and since racing rules required engines of less than 5L (305.1cuin), Pontiac unveiled the 303 for racing models only, never available to the public. In addition to the more refined cylinder heads, block casting reinforcements in the lifter galley and main bearing oil pan rail area, it had forged connecting rods with larger 716-inch-diameter (11mm) bolts. The first of the "big journal" Pontiac V8s, it had a bore and stroke of 4+332in 4in (104.0mm 101.6mm) and came with dual four-barrel carburetors. 10 with 308/320 degrees of duration and 0.445/0.447-inch lift (11.3/11.4mm) with 1.65:1-ratio rocker arms and solid lifters, special #529238 forged-steel connecting rods, forged aluminum 4.09-inch (104mm) bore Mickey Thompson pistons, #542990 forged-steel crankshaft with a 4-inch (101.6mm) stroke and 3+14-inch (82.6mm) diameter main journals. . Fuel pump: Will use 110-gph Carter All 1980 Trans Ams received this engine as standard with the option to delete this engine choice as a credit option for the standard L37 301. Released in 1961, the 421 was a bored and stroked 389 which sported a bore of 4.094 and a stroke of 4.00. RamAir 4 Motor Price $15500.00. This chart covers Pontiac V8 Engines; 265, 301, 326, 350, 389, 400, 421 . Returns; . It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. It was the same engine as the '67-'68 400 HO[18] but for 1969 and 1970 it included a driver-selectable outside air induction system on the GTO(it was a separate option on Firebird), with the hood vents opened and closed using a knob located under the dash, below and to the right of the steering wheel, its bracket labeled "RAM AIR". HOT ROD and CAR AND DRIVER) were fitted with the Ram Air IV-spec camshaft and functional hood scoops - a fact that has been confirmed by several Pontiac sources. Rods: Howard's billet 4340 certified steel, stock 6.625-in, floating pins Type Size Carb Horse Power Tourqe; Tri-Power: 389ci: 3x2bbl: 360 hp @ 5200 rpm: 424 lb-ft @ 3600 rpm: Base 8 . This may have been propagated by the only authorized company that is licensed to reproduce these decals not including the "6.6 LITRE" in the Trans Am decal kits, and only including "T/A 6.6" with no extra cost. These are general guidelines. Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. engine, dual exhausts, three-speed manual transmission, Hurst shifter, 3.42:1 rear gears, heavy-duty suspension, bucket seats, upgraded upholstery, carpet, emblems, "Decor" louvers, pinstripes, lower . Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. This was a project started with the end goal of building a 427 Hemi. 1966 yk 421 376 a 3x2 1967 zg 230 165 a 1 1967 zm 230 165 a 1 1967 zk 230 165 3 m 1 1967 zs 230 165 3 m 1 . The 421 badging was standard on the 2+2, the 421 H.O. The Pontiac 301 EC (Electronic Controls) version offered in 1981 produced 155hp (116kW) and 245lbft (332Nm), although it's rumoured that the actual output was closer to 170hp (127kW). (V8) - Stamped on right front side of block or beneath production . Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 The heads were a new design featuring siamesed intake ports. Located at the back of the engine near the Distributor. . This is it! The four-barrel version, set up for sustained high speeds, had 390 hp. From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. Forged rods and forged-aluminum pistons were specified, as were unique high-flow cylinder-heads. Rocker studs: ARP special 34-in bottom This was the last run for the 455 (7.5 L) motor from Pontiac, and production ceased on the 455 this year as it could no longer meet the emissions requirements any longer. It was removed from the design for the 1960 model year because designers moved the generator and the power steering pump from atop the front of the engine down to the front of the heads to accommodate a lower hoodline. For 1967, Pontiac retired the 389cuin (6.4L) and replaced it with the 400cuin (6,554cc), a 389 bored-out by +0.06in (1.5mm) to a bore and stroke of 4.12in 3+34in (104.6mm 95.3mm). Forged steel 6.625in (168.3mm) rods (Ram Air V style), Large-valve heads (valve diameter): 2.4in (61mm) intake, 2in (51mm) exhaust, Small-valve high-RPM head (valve diameter) 2.19in (56mm) intake, 2in (51mm) exhaust. One of the key modifications over the standard 301 4-barrel was the 301 Turbo block. The 2+2 reverted to option status for '67, then died, a proud relic of a time when big cars, Pontiacs in particular, ruled the streets. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Transistorized ignition was available. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. None of Pontiac's Ram Air engines actually enjoyed any true ram air effect. It was rated at 376bhp in 1967 and 390bhp in 1968 and 1969. Secondary: Front and rear #70 By comparison, the factory 421 H.O. Year: CU IN: Casting # 1967: 326. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. [citation needed] It was the first engine that incorporated Pontiac's round-port head design in a production vehicle, however the intake port was the same as other D-port heads, leaving a head which exhaust port could nearly match the intake at high valve lifts. 1966 Pontiac Catalina technical specifications and data. CO2, . The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. It added '421' engine badges on the front fenders, 2+2 insignia on the deck lid and rear fenders, and simulated louvers behind the front wheel cutouts. Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. Pontiac ignited the classic muscle car era with a stroke of marketing genius. [22]. The W72 also featured a camshaft with a higher duration, finer tuned 800cfm Rochester Quadrajet, insulated fuel line, larger 60PSI oil pump, chrome valve covers, a larger harmonic balancer, and the "T/A 6.6" Shaker decal. Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. Jim Taylor knows this, so he took a mathematical engineering-style approach to finding 100 hp in a relatively optimized engine. While production of 196970 A-body Ram Air IV cars was low at just 1563 units(759 1969 GTOs including 302 Judges, and 804 1970 GTOs including 397 Judges) 1969 and 1970 model year F-body Ram Air IV cars were even rarer at just 245 total units produced. 1967 was the last year for closed-chambered heads. . Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm The 455 was used through 1976 when it, as with many other large displacement engines, was discontinued as manufacturers moved to smaller, more efficient models, even in their full size car lines. Only 630 Bonnevilles were produced for 1957, all of them fuel-injected. In light of this, the 'Year' entry, as indicated by the chart below, may actually represent the year that the heads were cast, versus the year that they were actually installed on an automobile. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . This engine was first offered in 1967 as the top engine option in full-size Pontiacs. In 1973 a further refined and even stronger but less powerful version, the Super Duty (SD) engine, was planned for Firebird, Grand Am, Le Mans (GTO), and Grand Prix models. Given that, it was no accident that the leader in intermediate muscle also put together the finest full-size performance machine -- the 1966 Pontiac 2+2. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. 1975 Factory Service Manual lists the SD-455, but the SD-455 did not meet emissions for the 1975 model year and was canceled. Block description: '64 421ci #157 From 1959 to 1966 Pontiac continues making improvements. Year. It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. Both of these engines were originally dealer-installed options, but since the NHRA moved to limit racing eligibility to factory-available options on cars available to the public, Pontiac made the SD 421 a factory option for 1962, and most of the approximately 164 SD 421 engines were installed in the Catalina, with another 16 being installed in . The 1971 455 HO was available in the Firebird (optional in Formula; standard in Trans Am), the GTO (standard with "The Judge" package), and the 2-door LeMans, LeMans T-37 (including GT-37), and LeMans Sport.
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