Vintage Weiand WO4D Dual Quad Intake Manifold fits 1957 and I believe 58 371 Oldsmobile. You can see the port measurements in the pics to compare to your heads. The manifold is in real nice shape for its age. The only welded area is where someone drilled to add a vacuum port for some reason so I had it welded up, see pics, won’t hurt a thing and could be sanded flat and won’t show at all. Fresh stainless helicoils in the thermostat housing bolt holes, all threads now look mint everywhere. Clean it and it’s ready to install. Shipping will be to the continental US. We sell to the US only.