Yup, I was gonna say about 275-280 too, just because the HO. At least thats what I'm hoping when I get most of my little small stuff done on mine. lol.

My regular 5.3 crew cab ran about 279 to the wheels with the elect. fans, asp pulley, CAI, exhaust with no headers, and a nelson tune, of course it had 3.90's, converter, no TQ management and some tranny upgrades, some free mods, plugs/wires. But thats about it.