Running Rich

George what are the spec's on the cam? is it the 484 or the 509 etc etc...the reason I ask is the amount of vacuum they pull at idle and maybe you carb has a power valve in the 6.5 range which if the cam pulls less it will dump extra fuel constantly. For example if the cam is pulling 3-5 inches of vacuum at lidle and the power valve in the carb is a 6.5 it will cause a rich condition. Depending on the list number of your holley factory jetting my be too small for your engine cause the lean condition (pinging) under hard excelleration. Timimng will not affect a rich condition as much as it would a lean one so get a timing light, what distributor is it? Mopar? MSD?