The truck without me in it and no gas weighs almost an even 5000lbs, I weigh 260. Id expect race weight to be around 5300 with a 1/4 tank, me and no tailgate I still had the spare on last time I ran that 13.9
Im gonna dyno soon and I expect around 310 rwhp


mods are head work(unported), cam, full exhaust, stall, shift kit, CAI, HPT

Im almost certain the ls1 sound comes from the added compression

thanks for the comments