[] 1955 up until about mid-1959 Valve Covers have staggered mounting holes.

[] 1955-1957 engines have Oil Pumps with a longer drive shaft to the pump and a pump which sits father from the block.

[] 1960 was the first year for Aluminum Cylinder heads which were installed on the Corvette.

[] 1962 The First Year a Carter AFB carburetor was used in a Corvette.

[] 1964 through 1972 the Transistorized Ignition was offered on the Corvette.

[] 1964 The First Year a Holley four-barrel carburetor was used on the 327-CID / 375-HP Corvette.

[] 1964-1967 Chevy II motors had spin-on Oil Filters.

[] 1966 The First Year a Rochester Quadrajet was used on all standard performance small-blocks.

[] 1967 and earlier engines Oil Filters were of the short canister type.

[] 1968 and later Oil Filter bosses on all blocks were tapped with 5/16-inch threads.

[] 1968 and later all Oil Filters were of the spin-on type.

[] 1968 and earlier or there abouts Valve covers have no holes for PVC or Oil fill caps.

[] 1968 through 1971 a change over from flap type to peg type Intake Manifold valley seals were interduced.

[] 1969 was the first year of production to use Accessory Mounting holes in the cylinder heads.

[] 1969 Chevrolet changed from the short water pump to the long water pump.

[] 1970 was the first year for the Screw-in Rocker Arm Studs and push-rod guide plates.

[] 1982 Cross-Fire fuel injection system was introduced on the L83 Corvette engine.

[] 1982-On GM has introduced several metric series starters including one for the 305-CID.

[] 1986 Aluminum Cylinder heads were introduced in mid year on the L98 Corvette engines.

[] 1987 Hydraulic Roller camshafts were introduced on production engines.


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