I used b-body hp manifolds on my 70 Duster with a 440. Just trimmed the steering column outer sleeve like R/T1968R/T said. I had no problem whatsoever. Should have more space with a low deck engine.
Automatic or 4 speed ?
I'm going to ASSuME that if the factory could have used the B body manifold they would have , cheaper than tooling up a new casting.
