We have a 1969 Chevelle with a 3.08 (I think) 12-bolt. I'd like to install a posi. Does anybody have the GM p/n for this? Thanks. (Yes, I did a search, first).

I don't know a GM # but if all you want is a factory posi, get an Eaton posi #19554 for a 3 series gear. This is what Chevy used and Summit and Jegs have them.

Thanks!