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It is an all-iron engine (block and heads) with two valves per cylinder. It retained the 4.25 in (107.95 mm) bore diameter of the old 7.0 L (427 cu in) and 7.4 L (454 cu in) big-blocks, but the stroke was increased to 4.37 in (111.00 mm) for a total displacement of 495.95 cu in (8.1 L).
In 1966 the L78 was available exclusively in the intermediate line. For 1967 the engine was additionally available in Chevrolet's new pony car, the Camaro. The following year the motor became available in the compact Chevy II also. For the 1970 model year the 396 was bored 0.03 in (0.76 mm), resulting in a 402 cu in (6.6 L) engine.
Chevrolet's second generation big-block, the Mark IV had been introduced in 1965 in two 396 cu in (6.5 L) versions. In 1966 Chevrolet added a 427 cu in (7.0 L) version that was available exclusively in the sports car (Corvette) and full-sized (Impala, Bel Air, Biscayne) lines. While a 396 was still available in full-sized cars, the L72 and the ...
The big-block engines initially used a forged crankshaft with a stroke of 3.975" for the 1965-1967 425 and 400 CID versions; starting in 1968, both the 400 cu in (6.6 L) and the 455 cu in (7.5 L) big blocks used a stroke of 4.25 in (108 mm), with crankshaft material changed to cast iron except in a few rare cases.
1965–2009 Chevrolet Big-Block V8 (originally "Turbo-Jet") 1967–1972 GMC Truck 60-degree V8 (derived from the GMC 60-degree V6) 1967–1984 Cadillac New V8; 1969–1984 Holden 253; 1969–2000 Holden 308 (stroke reduced in 1985, making it 304 cu in (5.0 L); 350 cu in (5.7 L) version also produced from mid 1994 for use by HSV) 1982–1995 ...
The 1975–1976 262 was a 262.5 cu in (4.3 L; 4,301 cc) 90° pushrod V8 with an iron block and heads. Bore and stroke were 3.671 in × 3.1 in (93.2 mm × 78.7 mm). Power output for 1975 was 110 hp (82 kW) at 3600 rpm and 195 lb⋅ft (264 N⋅m) at 2000 rpm. The 262 was replaced with the 305 for the 1977 model year.