I would return the item if I didn't need it so urgently. When the item was delivered the Rochester 2 throttle was not working. I had to cut off an ear. I then bolted on the carburetor and there was a massive vacuum leak through the bolt holes. I used a JB weld to seal the holes and then had to grind them down to fit. very disappointed. Mister. Gasket 1933 2 to 4 Barrel Carburetor Adapter Kit