well i was convinced Non lock up was the way to go and i believe we did single piece input shaft, which right now is probably still overkill for me but I was told by several people that was the only surefire way to make it near break proof. the only other lock up that can take high HP is electronically controlled. thats what i was told anyway. but i upgraded my valvebody to a lentech. it increases oil pressure throughout so you dont have have worry about burning out a gear and you can drive the car like a manual safely. as for the other stuff it was all direct replacement stuff, i dont remember taking stuff from other models. just remember getting better quality rebuild kit, better OD band, larger servo, this was like 10+ years ago. I just remember my Tranny guy at that time telling me what i needed, then spoke to PATC and put together a "packge" of stuff. With the valve body and stuff we did get, i remember my tranny guy saying it could handle upwards if 500 HP. my main mechanic said in his opinon it could take probably closer to 600-650. Im no where neat that but im working that way.
but if your not looking to make high HP anytime soon, at least probabl;y not over 300, and if your gunna have to rebuild anyway, its not much more for a better rebuild kit. I remember the guys over at PATC were very knowledgeable and i beleive they even have an in house project car that is a "happy balance" for a tough reliable AOD in a classic mustang. its a lock up hardned input shaft setup i believe and it has a 289 or 302. id call them up and see what they think.
sorry if i wasnt much help in that regard.