1967 block in 1966 Corvette

[Timothy B.]

Re: 1967 block in 1966 Corvette

Terry,

I will take a look at that book, I am aware of the different cast #'s but never could figure out differences just like 2680 and 4577 crankshafts for 327..

[John H.]

Re: 1967 block in 1966 Corvette

Why the different part #'s for the engine blocks? I can't see any difference in any of the 327 blocks.

Tim -

That was the 60's version of "continuous improvement"; most of the differences related to changes in the foundry cores for web thicknesses, radii, wall and deck thicknesses, coolant passage sizes/contours, and changes that didn't affect the machining operations. The high-speed machining transfer lines were pretty much "sacred" from a change perspective, as they were a HUGE installation with enormous investment, ran 24 hours a day, and didn't lend themselves to ANY changes.