318 fuel mileage

In my SV1 that I had 20 years ago, I had a 318 in it, 650 spreadbore Holley, Holley Street Dominator manifold, good set of pipes, 904 trans - stock, and it would get 26mpg. If you want economy there are 2 thing that really help - 1. Spreadbore carb & 2. Your right foot