04 Engine Swap

Hey guys I've got an 04 ls sports coupe. I was curious if there are any more powerful engines that would bolt up to my tranny. I'd like around 170-180 hp, that would be really nice. Maybe a used engine i could swap the ecotec for. Thx

why?!?! the ecotec is a great motor, your not going to be able to swap anything better that would make you emissions legal, you could swap for a LGO or W41 from the older nbodies, but you would have to go to OBDI and all. I think there is a supercharger out there for the ECOTEC that you could put on for the same price as a freash W41 or LGO swap would cost you. or you could even turbo it. check out www.exploitedracing.com