Same problem, I can't a number for a left side H.P. manifold in 72. I have a chance to buy a NOS manifold part# 3744821 cast.# 3751724. My white book list's this as H.P. in 73.The right hand will be 2899879 and I don't have an answer for you on the LH. My book doesn't actually have one listed for '72. In 1971 it would have been 3418351.
Agreed,.... pun intended??I think everyone is working from the same source. We need someone with a legit pair to pipe up.