340 Crankshaft balancing.

draginmopars said
What pistons do you have (70) vs (73) will be different weights
cast crank with (70) pistons will take a lot of mallery to balance

Hmmm-very good point-what's the weight difference between the two?

Then again, if he's rebuilding the engine and it needs bored, most aftermarket pistons are a good bit lighter...