I agree with Jeff and Dave. They can be built to withstand tremendous torque & power, just as any automatic can be. The reason that a LOT of tranny shops don't think they can handle the power has a lot to do with that damn TV cable grommet going bad. When that grommet goes bad, it literally fries the AOD to death. I rebuilt the one in my '87 Notch by myself with some considerable upgrades. You can do it yourself or just go with a Lentech. I've heard they're the best on the market so far. If mine blows, that's the one I'll be getting.
You must absolutely visit the Baumann Engineering site that Dave gave you the URL for. I learned a TON of info right there, especially the effects of TV pressure when I tore mine down (don't you just loooove the smell of burned clutch packs???). Read up, have fun, but spend your $$$ wisely. Good luck.
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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch