your best bet is to find a reputable builder near you and take it to them and let them build it. Im sure someone will chime in and let you know of some places near New Hammy that do good work
Your best bang fo' your buck will be having it built by a reputable builder. That way you only pay once! Ben (duratothemax) is reccomended builder that is in ct. He is a vendor here
i have a intake and exhaust right now looking to do efi live soon, the reason i wanna do some work to trans is so i dont have to worry bout it when its tuned
If you are just looking for 100HP, something a little extra, I honestly wouldn't do anything to the Trans yet. If you want 500HP right off the bat, then yes, a Trans is mandatory as well as a few other parts like a lift pump and some other things.
Alot relies in your builder i would find a great builder before i would shop for the trans,you can have the best trans kit in the world and destroy it in a matter of days if its not done rite.Find some guys in your area that have a built trans and ask who did it how long ago so on so on.Just do your research 1st IMO