[MOTORHEAD]

What Ron said, +
Assuming you have 15" wheels, Cooper Cobras work for me. If money is no object, Avons.
My weber set-up is off the engine at the moment, due to a manifold problem. Am running a 4150 at the moment, and with some tuning, the best mpg I'm getting is 8 mpg city.
The EFI should get you better fuel economy, but will set you back thousands of $.
I installed an Eight Stack on a SBF some years ago and was impressed with it, was planning on doing my FE, but now don't have the extra $ laying around.
Where are you located ?