Quote:

SP2P is best when its recycled..



Couldn't have said it better!

I bought a new manifold and Holley Economaster carb for my 318 back in the gas shortage days, and the truck couldn't get out of its own way. I got about 2mpg better than the stock setup.

I now have a Performer cam, manifold and carb, and get better mileage than the SP2P, with a huge increase in performance.