340 parts interchange & performance Q
The reason I suggested getting a forged crank is that the 73 340 cast crank is a one year piece. The balancers are all old and I wouldn't want to trust them. It's not balanced the same as a 360, so you can't steal one of their balancers, either.
With so many people building stroker motors right now, you can probably get someone to give you a stock stroke 340 crank. I was even thinking about looking to see what I had to give you.