Manifold questions

Hey guys, I need advise on what each manifolds can be ran on a 318-360 in 72 duster. I plan to put 360 heads on 318 and want to use manifolds instead of headers for price savings and I have a set of center dump but not sure they will fit they might work on pass side but not much room on driver side, I am running manual PS gear box with the small starter. Any ideas ? Thanks