I changed from a 4 bbl Edelrock Performer inlet to a 2 bbl stock Carter carburetor. All the screws fit perfectly, the gaskets are of really good quality. The only problem I had was that a few other holes in the adapter plate left air inlets open, so I had to make some plates to cover the holes to prevent the inlet from leaking. Aside from looking great and more importantly working, I got rid of this big 4 barrel gas pig.