Top Swap Info and Faqs, Also lots of 3800 Info read this, and then re read it.
your tech 2 is not gonna re tune the pcm. if your na now your running twice as much timing as a sc set up. so you'll need a re tune.
hd tranny is kinda a waste of money, not needed. only difference is the hd diff. and most like the na gears better then the sc hd tranny gears.
and get the 3 inch down pipe if your plan is to top swap it. might even want to get headers and add a 3 inch 50 dollar ebay hi flow cat to the dp.
