LS1's are rated at those numbers not LT1's, LT1's made the best of 285HP in the later 96 & 97 years before was like 250-265HP.... And 350z/G35's are slow/heavy IMO, I used to spank those in my SRT-PT(PT Cruiser W/SRT-4 motor) along with mustangs, but at least GT's would usually give me a run for my money.....