327 Chevy Build
The 327 engine featured in this article is out of a 1966 Chevy Corvette. It is the original L75 engine rated at 300 horsepower. The aluminium valve covers are not correct for this motor.
Stripping the block was the first order of business. Engine disassembly on a small-block Chevy is fairly straightforward.
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Everything taken off the engine was cleaned, tagged, and put in boxes out of the way. The engine block was completely stripped before going to the machine shop.
The machine work included cleaning the block, installing new cam bearings and freeze plugs, and boring the cylinders .030-inches.
Rebuilding the 327 bottom end includes pistons, rods, crankshaft, harmonic balancer, and oil pump.
read 327 Bottom End Build
In almost every small-block Chevy engine build, the camshaft is replaced along with the lifters. As with all phases of engine assembly, care must be taken while installing the camshaft.
read Install Camshaft in Small-Block Chevy Engine
Chevy 327 Cylinder Heads
The heads on this 1966 Corvette were original, casting #3782461. Date codes are J-12-5 and J-20-5 (October 12th and 20th, 1965). These were one of the best flowing factory heads GM had to offer for the small-block. Cylinder head assembly included checking, measuring, cleaning, re-assembly, and painting.
Lapping valves does not take the place of a valve job, but it does confirm whether or not one is needed.
To get paint to stick to a cast-iron engine block or cylinder head, the metal must be very clean and dry.
327 Chevy Engine Before and After
read Spray Paint Engine Block And Parts
Following the cylinder head rebuild was the valve-train assembly, which included installing lifters, push rods, rocker arms, rocker nuts, and rocker balls.