K... here's my problem. The guy who owned my truck before me put the wrong harmonic balancer on. It is like off a 454 or something, i have no idea. Anyway, it hits/rubs my crossmember. There are several different options for the balancer when I call the parts store. They want an OEM number. So I figure if i find someone else with a 79, with a 350, it should be close enough. Can someone with a 79 please get me the part number off of your harmonic balancer? Would be much appreciated. Thank you.