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The 421.19 cu in (6.9 L) was introduced in 1961 as a dealer-installed Super Duty option. Unlike previous enlargements of Pontiac V8s, it did not replace the 389. The first of the "big journal" Pontiac V8s, it had a bore and stroke of 4 + 3 ⁄ 32 in × 4 in (104.0 mm × 101.6 mm) and came with dual four-barrel carburetors.
In addition to the 1970–71 L.A. Dart, Shrewsberry still owns his 1972 L.A. Dart funny car with flip-up body, his original 1963 Super Duty Tempest (one of only four remaining), the 1965 Hemi Under Glass Barracuda, the Knott's Berry Wagon, a 1964 Mercury Comet Caliente 427 which he raced in A/FX that year with Jack Chrisman (one of only 50 ...
The Pontiac Trophy 4 engine (also called the Indianapolis 4, [1] or Indy 4) is a 194.5 cu in (3.2 L) inline four-cylinder engine [2] produced by the Pontiac Motor Division of General Motors for model years 1961 through 1963. [3] Created from one bank of Pontiac's powerful 389 cu in (6.4 L) Trophy V8, [3] its only application was in the first ...
For 1963 only, Pontiac offered the 421 cu in (6.9 L) Super Duty with two four-barrel carburetors, rated at 425 hp (317 kW), as a US$2,250 option ($22,104 in 2023 dollars [5]) whereas the base Bonneville was listed at US$3,349 ($33,330 in 2023 dollars [5]). [14] 1963 Pontiac Bonneville sport coupe
The 405 hp (302 kW) Super Duty 421 was still offered to racing teams during the early portion of the model year but discontinued after General Motors ordered Pontiac (and Chevrolet) to "cease and desist" from factory-supported racing efforts in February 1963.
For 1962, Pontiac offered a 421 cu in (7 L) Super Duty V8 with two four-barrel carburetors, rated at 405 hp (302 kW), as a US$2,250 option as the base Star Chief listed at US$3,097 ($31,195 in 2023 dollars [5]). [10] A rare option, it was probably never ordered on this somewhat heavy sedan.
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The Tempest was the result of a decision by the Pontiac division to enter the compact car market following the success of the Chevrolet Corvair. [4] The division wanted to produce a clone of the Corvair, but instead GM gave Pontiac the lead to develop a new car in an interdivisional program coded named "X-100."