Everyone who has responded knows more than me but now that you have a "good" cylinder head, do 1/8 mile, and are still at 440 cubic inches, I think something with less duration would run quicker. I think AndyF commented in a thread about Trick Flow combos, even at 500 CI, not needing as much duration to produce good numbers as other types of combos. Look at how small the cam they offer is and I think they claim over 600 HP with it.