I am running a Holley 850 DP on my 454 and just want your opinion on my jet sizes. I have a front power valve but it is blocked in the rear. I am running 78/78 front and back.

Thanks

Dino

Usually if you don't run a powervalve in the rear you will have to run 8 jet sizes bigger than the primary to keep from going lean at WOT.This is just an average that racers have found out through the years.