I won't run it past 5gs right now. If I pop the engine I don't care. I have 3 magnum engines so if it blows I put another in lol. I will upgrade to different heads like stated before but right now the money isn't there.
Lol, why so many mag engines? I've seen em sprayed with 150 shot on junkyard pulls and stay together. But that's awesome! I just picked up a spare as well. I'd say a sure grip and 3.55s if you don't wanna be disappointed. You can get a .500 lift cam in there with stock heads, but not much more. I put a .512 lift in mine. Had just enough clearance.