[Zoomad75]

I'd just go with stock vortec manifolds. Just about any stock small block truck manifold should fit from a 73-87 as the frames are pretty close in shape there. You might check with DirtyLarry here as he dropped a complete tbi 350 from a van into a 71 2wd 3/4 ton and he went with the stock manifolds from the van. I just can't remember exactly what he did, but he'd know.