Well my buddy has an AOD out of his 90' that I can pick up for dirt cheap. I would just need a convertor and supporting mods to make it handle some power
things to keep in mind:
1.) 4R70W is for Mod Motor only (specific bell housing) The AOD-e has similar parts as the 4R70W with the only differences being the gear set having a steeper 1st gear, so the AOD-e or AOD gearset will be better suited for a turbo car
2.) AOD's can be retrofitted with all the 4R70W peices (2" rev drum, mechicanical diode, stamped steel direct drum), which are all stock parts, so cost is somewhat cheap.
3.) AOD-e's require a trans controller (Baumann or TCI) which cost $500 est.
4.) AOD downfalls are non-lock up convertor in performance application and dealing with a TV cable......
5.) AOD-e downfalls - convertor cost for lock-up style are expensive, TCS control box is expensive, tuning lurning curve)
If cost is not an issue, then the AOD-e with all of the latest mods and a TCS with lock-up convertor is the way to go. If you are more budget minded, then an AOD can be had for pretty cheap with a nice set of upgrades and convertors are a dime a dozen.
I have an AOD in my car, which is a 418W with an 88mm Turbo, so we have similar combo's. If you want to talk then email me and I will send you my phone #.
Tim