I'm planning on doing the 200R4 swap, as well. Like stated, the 200 has better ratios, and can be built STRONG (my brother has a 10 second Grand National, and his trans has been in that for over 10 years with NO issues). I hated the AOD in my 5.0 Mustang, had to shift from 1st to Drive and back to 1st to lock it in 2nd, and always, always, downshifting. I hate putting GM parts in my Ford, but I already have HEI, GM power steering pump, and Chevy style rods in my 552. The 700R4 is a good trans, too, but the 200R4 is actually the stronger of the two...at least that's what the Buick boys tell me. AODE is going to be a pain for you because of the electronic controls, you'll need a stand alone controller.