^ Agreed. You can get all of the stuff you need to beef up the tranny for <$500. Differentials and Converter will cost a tad more.

My original intention was to run a stock W4A33 on my 500+ AWHP build, just to underscore how capable they can be. I still believe they are; I just feel that you take your chances any time you install a used trans--and mine finally gave up the ghost after 2+ years.

Shep doesn't do ATX's...and hasn't for quite some time (if ever). Kiggley recommended English Racing, so it's between them, IPT and Level 10 if you want to ship it out and have someone else do the work for you. Problem is, I don't believe any of them offer a center-differential spider upgrade (like Jack's sells), and will instead WELD the center differential. That's not something you want on a DD. I wouldn't trust Quaife center differential either (there's a LOT of stories about them breaking). Quaife fronts should work splendidly though.