Hardblock?

[65signet]

Originally Posted by James L Miller

John, I've attached the sonic check of the three 273 blocks I had sonic checked in January. The "orange" block checked worse than the "greasy" and "rusty" blocks. None of them were all they great. I think I will build a 2bbl engine with one of them, save the best for a 4bbl engine after I get my feet wet (hopefully not literally) with the 2bbl engine on building Stocker engines.

It seems that all the 273 blocks are a little thin, the 67-68 i have found are the worst, i had to fill my block.