I would upgrade to a billet front clutch retainer, add a bolt in sprague in the back of the case, run 4 pinion planetaries, replace both servos with billet, and the Kevlar frictions. I'm guessing this will be more of a road race type drivetrain. Witha light car, and single turbo (it must be decent sized for that level with a single) you will have some lag. Your convertor will ned to be very special IMO. I'm taking a shot saying I'd go 9.5" with ballooning plates and a very tight 22-2500 stall. I would want it beyond the stall speed when the boost really comes up. but as bosst rises, the stall speed will rise too. I would consult someone like Ultimate Convertors on that. They do a lot of big turbo Fords.
