I'm running a holley 850dp on a mild hardin marine 454 +.030, and I am running too rich near WOT. I'm not sure what I need to jet down to, or if i just need to change out my power valve. Here's what I have in there right now -
Main jets - 75, 81
Power valve - 6.5 Hg
Secondary jets - 93, 89
I don't know what cam I have, but it is probably the stock hardin marine - thanks for any help