Don't know the part numbers off hand, but the Dart and the Road Runner have early MP heads, we bought them probably 15 years ago. The 66 Coronet has Stage V heads. My 65 has original iron heads from the late sixties. I do have a set of Edelbrock Victors sitting on the shelf here, bought them last fall. Also have a set of old Barnett prepped iron Super Stock heads. Don't know what will do with them yet. Perhaps turn my son's 64 wedge car into a Hemi, and use them on it. Or put a Hemi in my other son's 71 Satelite. This old man is satisfied with my ancient 426. I'll let them deal with it, and work it out. I'll referee.