My point was they were cast up to the basic dimensions of the Pontiac block.
Sorry if I did not make that clear.
The enclosed lifter valley was done from the beginning as it was identified in the early 60s
by racers that the blocks were weak in that area. Racers like Joy Fair, in Michigan made
"connection bars" that attached to the heads to keep the blocks from spreading.
Same deal as far as the lifter braces. The enclosed lifter valley fixed a bunch of those issues.
But the basic dimensions were based off the GM Pontiac block blueprints.
The thicker front face of the block, a slightly taller pan rail, taller lifter bores.
The tall deck blocks, short deck blocks, and the versions of the aluminum blocks came later.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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