340 Static Compression Numbers and Test Procedure

HB was tight used my puller (handy tool use it a lot for many things). Saw that crud too and plan to clean out thanks. 135 lbs check. Will probably hold off on pulling the timing cover and assume the crank is cast original. I know the flexplate is for an internally balanced engine so I have to replace that as well....
Are you saying that the flywheel is internal balance and the balancer is internal balance?