I drive an 2000 5.3L Ec/SB silverado with an auto tranny. I wanted to try and give it some beef off the line with out boost and no juice. I saw that AFR has a set of LS1 Heads for my truck but have been told I out to go a different route such as LS6 Cam, heads, and manifold. They said it could be done with the exception I would have quite abit of other small things hat needed changed out in thr process anyone know where to start?