What happened to the 318 in 1971?

I took the liberty of trying to prove the Scr's listed, using a standard 9.600 deck, and a 4.100gasket bore. I found it impossible.The results are both higher AND lower than those listed.
IDK what that means.
Ima guessing some pistons were dished, or the block heights varied from 9.600

Chrysler ran the head faces fat. You won't get the numbers to jive...

That's why I measure the compression of my engines individually....

How to Check Compression