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[citation needed] In 1968, the last year for factory headers, they had 1.75 in (44.5 mm) primaries x 3 in (76.2 mm) collectors. A stock 1968 Z/28 with the close-ratio transmission, optional transistorized-ignition and 4.88 gear, fitted with little more than the factory cowl plenum cold-air hood induction and headers, was capable of running 12.9 ...
Head gaskets were originally copper and slightly thicker than the composite gaskets of later engines. TVR 4.3 engines tended to have elaborately ported cylinder heads with minimized valve guide protrusion into the ports, and Duplex timing chain with timing adjustment by vernier gear were specified although in practice, not all engines received it.
Both used a single two-barrel carburetor. In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than 330 cu in (5.4 L). and so the 326 bore size was reduced to 3.72 in (94.5 mm), giving a true 326.06 cu in (5.3 L).
The 4.2-litre engine from the factory had unsmoothed steps between the inlet manifold and head, and the manifold gaskets were not a good match for the inlet ports. These engines therefore make excellent bases for some modification, achieving approx. 220 bhp (164 kW; 223 PS) SAE net and increased torque merely by "flowing" the head.
Other than that, this engine is vastly different from the Gen-1 model. The Gen-1 engine is physically the size of a big-block Ford or GM engine, and is sometimes called a "big-block". The Gen-2 is closer to the physical size of U.S.-made small-block V8s except for the bore centers, which are the same as some big-block engines.
The 322 Fireball V8 in a 1956 Buick Century. Buick's first generation V8 was offered from 1953 through 1956; it replaced the Buick straight-eight.While officially called the "Fireball V8" [1] by Buick, it became known by enthusiasts as the "Nailhead" for the unusual vertical alignment of its small-sized valves (Originally it was known to hot-rodders as the "nail valve", because the engine's ...
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