I've got an 82 auto. As for engine swaps with the auto, forget it. Anything over 175 horsepower will tear the stock auto to shreds eventually. The adivce I got was to either convert to a W-58 maunal or retrofit the MKIII supra auto to fit wich can handle around 250-280hp approx. (yes, it's probably expnesive but not as bad as getting a rebuilt auto for the 82, my remanufactured trans cost $2800. The lowest bid I got was for $1500 and that was to rebuild the trans that was in the car that had only 1st gear left when I drove it to the shop. ;-) One to many peel outs!) If I had to chose again, I'd probably got the w-58, it's good up to around 300hp I think? If you can drive stick or are willing to learn, go with the W-58, it's alot more fun to drive with a manual anyway.
Brian Fairfax,VA