I have an 02 T/A with the 5.7 LS1 and it has well over 100K miles on it..no engine mods, just some bolt ons like 90mm trick flow throttle body, 160 degree therm, SLP Loudmouth cat back exhaust, Diablo predator tuning...car puts out around 320 RHP on the dyno...debating on rebuilding engine to either build up top-end or go with a supercharger...I'm looking at the top-end kit Trick flow sells which comes with heads/cam/roller rockers and all gaskets...supposedly will bring stock LS1 up to around 530 hp which I'd like to get to...everyone tells me to def rebuild bottom end of motor if I choose to do this...so my question is does anyone have experience with that top end kit from Trick Flow or any other recommendations on doing top end work to bring out more performance in my car? I understand the performace is in the heads on the LS1 so I assume I need to do something with heads-even something as basic as porting and polishing them...I'm not a mechanic so I'll be relying on my local mechanic to send out block for machining and to bolt everything on...I have a budget to work with and would like to stay around $5k if that's possible...please advise if you have any ideas for me-thanks