I have a 2000 trans am a4 with 165,xxx miles with lt headers and a catted y,

slp lid and its puttin out about 318hp @ 5250rpm and 343 torque @ 4400rpm

with a tune. So wat i think wat im lookin for is a setup for a pretty streetable

ride as this is my daily driver id rather have my power in the lower rpms. Im

wondering if its worth putting heads and cam or just buying a new engine

and starting fresh and building up with an ls6. Because as it is i already have

a knock when its cold and plenty of miles and i dont think it makes any sense

to do anything twice. thanks for any help