I am putting a 451 into a 65 dart. Streetmaster mounts, notched the kmember but cutting the half moon shape on the K(back to the weld) to a square & will be boxing it back in. 68-70 B body HP ex manifolds will fit and I saw(on FABO actually) a pic of an early A w a 440 w a set of the max wedge iron manifolds which would be ungodly heavy but would flow nice(Mancini has repros). I am mating this to a 904 w a JW ultrabell. 187 pan w the idler notch