I am sure all the B and E body big block high performance manifolds are basically the same I have a pair left over from a 1968 440 Charger (1968 castings) that I will eventually use on a 1970 Barracuda. I also have one manifold that is a 1973 casting it looks a little different with some ribs on the side and some bolt holes (for a heat shield?) but it would be a direct replacement for the earlier manifold.