Personally, I'd suck it up and spring for a rebuilt T-5 from a company like D&D Performance if I were you. For $999, you'll get the hardened 3.35 Super Alloy gear set, carbon fiber blockers, steel bearing retainer on top of a transmission you'll know to be top notch and handle the torque. Not to mention you get a warranty.
Nickel and dimeing your way through a few items is fine, but generally a good working transmission isn't that type of item. You get what you pay for.