Differences in 318 block.

So is it standard or is .020 over? What did it measure 1/2 inch down from the deck surface? This is where the most wear would be.
View attachment 1716238105
3.910
"Clean up," the '71 block by 0.040" to 3.950.
Get yourself a new 4" crank.
You now have a 392 WEDGE.
looked into that. About 2300 on that. Will have to wait on that great suggestion.