AOD's are inherently weak, but a few choice parts can make them contenders. Get a rebuild with quality clutches get a good valve body, a good torque converter, a one piece input shaft, and there are a few other considerations.
What I would do is contact Lentech or Performance Automatic, they make good transmissions. They are helpful people and will assist you with whatever you do. Oh yeah make sure that you add an external cooler that actually gets air (like if you have an LX and the air doesn't work take out the condenser and place a trans cooler there).
Hope this helps a little. BTW, I heard AAMCO sucks from many people over at
www.Ford-Diesel.com , they have complaints about them too.
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88GT stock shortblock, GT-40 iron heads, Edlebrock Performer intake, 24# inj, Pro-M 75mm Bullet MAM, 3.73, hurst short throw, F-303, electric fan, alum rad, FMS HD clutch, R134a ac conversion, 70mm TB , and some other stuff I probably forgot, 13.02@106 with a 1.87 60ft