340 steel crankshaft

I’m in cheboygan , zip 49721. Not in a big hurry. Hopefully in the next 3-4 weeks. I have a cast crank I can use if I have to, Was hoping to rebuild with forged so I don’t have to weight flywheel.
thought older 340/318 where INTERNALY balanced thus neutral balanced fly wheel ???e

any one have comparison pics of a steel 318 and the internally balanced 340 forged crank ?? mainly the counter weight and drilling mentioned in post #5 difference ??

I may have a poly 318 honey hole !!!! advailable