I'm running a '97 454 Mag with a B&M/Holley 174, Nikerson Holly, SS crossover, and Gil Exhaust. I can hit 74 on a cold day (94 Shooter 4400lbs dry). I turn a labbed 26 Bravo which I think is slightly over propped, but my cruise is great. Also my K-planes aremounted a little low - fix this in the sping. My boost gauge is at 4lbs. right now. I was thinking about bumping the pully up so I get 5-6lbs. Any risk in a non-intercooled setup? It runs really rliable now. I also use a Tbolt IV distributer with 24 degs - pretty mellow IMO. The builder said that there "was more in the timing". I posted this before but did not get much response. I see here alot of you run similar. Picture before the crossover and pump removal it dyno'd at 525hp.