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The 396 cu in (6.5 L) V8 was introduced in the 1965 Corvette as the L78 option and in the Z-16 Chevelle as the L37 option. It had a bore × stroke of 4.094 in × 3.760 in (104 mm × 95.5 mm), [ 27 ] [ 28 ] and produced 375 bhp (380 PS; 280 kW) at 5600 rpm and 415 lb⋅ft (563 N⋅m) of torque at 3600 rpm. [ 29 ]
Also called the GM small corporate pattern and the S10 pattern. This pattern has a distinctive odd-sided hexagonal shape. Rear wheel drive applications have the starter mounted on the right side of the block (when viewed from the flywheel) and on the opposite side of the block compared to front wheel drive installations.
The block entered production in mid 1965 as the Mark IV 396 cu in (6.5 L) "Turbo-Jet," phasing out the first-generation W-series Big-Block. In its first year the 396 was available as the L78 option in Corvettes and full-sized ( Impala , Bel Air , Biscayne ) models, and as the L37 in the intermediate ( Chevelle ) model.
It is widely accepted [citation needed] however that the minimum requirement for a vehicle to be Number matching (or matching numbers, depending on local terminology) is for the original Chassis number and/or Vehicle Identification Number (VIN) to match to the engine block, if that is how the original manufacturer identified it, and the data ...
Cutaway showing thin-walled, deep-skirted, Y-shaped FE block (ending above the darker colored rectangular oilpan) The FE and FT engines are medium block [citation needed] designs, referred to as Y-block because the cylinder block casting extends below the crankshaft centerline, [citation needed] giving great rigidity and support to the crankshaft's main bearings.
A 396 cu in (6.5 L) producing 350 hp (261 kW) at 5200 rpm and 415 lb⋅ft (563 N⋅m) of torque at 3400 rpm big block engine was added as an option for the SS, [20] and the Z/28 appeared in Camaro brochures, and nearly 7,200 were sold. The 427 cu in (7.0 L) was not available as a Regular Production Option (RPO).
Tonawanda Engine is a General Motors engine factory in Buffalo, New York.The plant consists of three facilities totaling 3.1 million square feet (290,000 m 2) and sits upon 190 acres (77 ha).
In 1969 the 350 HO was upgraded again with the addition of the 400 HO cam, commonly referred to by enthusiasts as the 068 cam. Also added was the #48 casting number heads with a 68 cc (4.15 cu in) chamber for higher compression, along with larger 2.11 and 1.77 in (54 and 45 mm) valves.