[Marty68]

I have (believed to be stock) 1964 283. It has a new rebuilt 2 jet. That works good. I have an Edelbrock c3bx manifold. And a 1405 and 1406 carbs.
Edelbrock told me those carbs are too big for a 283..
So the question is would I see any gain by installing manifold and using my 2 barrel?
I calculated mpg yesterday at 15.6.
I like the look of stock air cleaner and script covers...