Scott... I have a turbo recommendation:
T51R KAI turbo... spend the money and get a good turbo and blow everyone away at Wakefield
I have a video of a LandCruiser with this turbo on it. PM me your email address and I will forward it to you... at $4k+ for a Turbo, it might be out of the price range
Or go a GT45 like this...
A big single turbo will give you
reasonable economy when you are driing around, but plenty of top end for the track...
Isnt a T3 what they run on a TX3/5 Laser?