My sentimental favorite is the Edelbrock Victor, BUT, I won't use them on my builds anymore unless the customer requires it, they just have too many problems and are too much trouble.
So that doesn't leave us with much. Therefor, simultaneously in order of cost and power potential, lowest to highest.....a really good set of Indy EZ, the ported Indy 440-1 or as mentioned earlier, the B-1 original.
The Indy EZ? Yes. A short while back we did a horsepower test on a 10.3:1 440 with EZ heads and an old Racer Brown roller from 1968. It made 658 HP.
