340 to 360 Harmonic Balancer Swap?

WELCOME TO FABO

forged crank 340s were internally balanced up to about 71. 360 are externally

i dont know if an externally balanced 340 72+ would work on a 360 though.

There is a Mopar book on small blocks that might be your best bet for an answer. i will look in mine tonight and repost if i find anything

I am sure someone else here will know for sure.