new guy with no car

[68custom]

hey all new guy from Sarasota Fl.
currently have no GM products but you never no what may turn up.
not to say I have never owned a chevy, I have had so many I don.t think I can count them all. I like to think I have a pretty good knowledge of chevy's from 1962 to 71 with emphasis engine and transmission.
now I am curious did many chevelles come equipped with 12 bolt rears in 1972. I am guessing only Big Block 4 speed cars if any?
thanks.