[4zpeed]

Tom V
"I do not consider jet changes as differing much from "out of the box""

Maybe not for you Tom, but anything I do besides bolt it on is a mod for me , although a simple jet change is highly acceptable, been there, and can now dabble in other areas thanks to your thread here.

After jets the only reason I ever dove into a Holley was to rebuild it, and the jet change was for someone else, I always used the 780 CFM vac 2nds right out of the box, worked great.

OK, so an accurate statement would be, with a simple jet change the 8156 would be a perfect carb for any moderate to high performance street 350-455, given the CFM requirements were not exceeded?

If so from what I have read (Tuner) and the information you have given here, one would think it would be a highly desirable carb, being that you have mentioned the newer 4779 is lacking in design.



Frank