Internally Balance Cast Crank?
Both the 70 forged crank and the one out of this 73 block have "a nice resounding tiiing" -- unmistakable! FWIW the pistons are the nice high compression 69/70 pistons, which the PO mentioned prior me buying the short block.
Left: cast ...............................................Right: Forged
When tapping on the cast with a wrench it should sound kinda like a thunk, tapping on the forged will give a nice resounding tiiiing.
Both the 70 forged crank and the one out of this 73 block have "a nice resounding tiiing" -- unmistakable! FWIW the pistons are the nice high compression 69/70 pistons, which the PO mentioned prior me buying the short block.