Gentlemen, I have a 77 350 in my pick-up and I'm wondering what type of harmonic balancer I should purchase to replace the counterweight with and can this balancer be re-used on an earlier model 350, say 69-72? Thanks, Glen.

 

Any 350/403/425/455/400 stock balancer should work fine for you.
I can send you one if you like $15 + ship