I have a question about using a standard square bore holley on a spreadbore edelbrock manifold. I have been using this setup for the last 2 years simply because it is what I have. How much, if any, improvement might I see changing to a correct manifold? This is on your general run of the mill 350. Also am I correct in guessing the improvement would be more profound if performed on a more specific, highly tuned engine? Thanks graemlins/beers.gif

A Performer intake is a dual flange intake ..either carb will work (squarebore or spreadbore)

Well, I'm pretty positive that is true, since I have been able to use the combo, but lets say they made squarebore specific manifolds also (they mayor may not), would I find any kind of gains or losses in switching to one? thanks for help