So I've got the power I want, but, should I be worried about my tranny? I dont have the money to buy a new suncoast or ATS transmission (Wich I wish I did) but I would like to do something to beef up my tranny without spending that much, I was looking at the Bully Dog Shift Enhancer, I was reading some of the other threads and the bully dog products wern't spoken of vary highly, so I dont know what to do.

I'd start with the transgo shift kit from suncoast.

Here's their web site link and also the info on the kit from their site.

http://www.suncoastconverters.com/gmc/gm_products.html

Transgo® Allison Shift Kit®
2001-05
Part No. S/K
Price: $208.00
You're looking at a NEW Transgo Allison shift kit for the 2001-2005 Chevrolet & GMC HD trucks, diesel or gas. This heavy duty kit corrects the common problems with these transmissions; goes into neutral under load, 3-4 slip, burned C2 or C3 clutches, sticks in one gear, won't move after extended parking, loss of pump prime. This kit includes smart clutch control valves for increased durability and Short-Crisp-Smooth-upshifts and kickdowns. This kit also reduces trouble codes. This is the most complete shift correction kit available and definitely the most reputable.