LS 5.3 4.8 $500 tops junk yard all day and it can hold 32lbs of boost and get little under 1200 HP. Would I recommend that much boost hell no. Can it be done yes dial it back though to what you want. Ive seen a j/y 4.8 with a rust pit above the rings in the #8 did nothing to it other then bigger fuel injectors and 115 octane race fuel prevent Kr with a pro charger went to smallest pulley and was pushing 31lbs boost at 1107 HP they were trying to get the internals to fail and couldn't.