Radar, I believe the autolite 4100 is the same bolt pattern as the Holley. There are adapters for the WCFB, 4GC, and the Carter AFB. If you want to try a 2bbl there are adapters for that also. Using an adapter to run a 2bbl on a 4bbl manifold is ok. My boat came from the factory that way. Running a 4bbl carb on a 2bbl manifold is not so good. Same thing with running a smaller pattern carb on a Holley pattern manifold not a problem. Do you have extra hood clearence? Jay

Last edited by intergrated j 78; 11/06/16 09:15 PM.