They were on a 70/71 duster b4 my 74 duster. They were on 400 block 470 stroker with stage 6 Mopar heads. They will fit a low deck with standard port heads, low deck with raised port heads and probably a raised deck with standard port heads. I can see if there is a number on them later this week. Looking for Max wedge port aluminum intakes and 1050/1150 dominator carbs
