The 99 up V6 4R70W's bolt to a Windsor and have about ALL the high cost Ford AOD type upgrades in them stock. Such as being able to eliminate partial lockup in 3rd without losing it in OD, having OD manually controllable, much heavier duty clutches, stronger shafts and gearset, stronger OD system, wide ratio and manual diode. Combine it with the excellent Baumann electric control (see
www.alternativeauto.com for a writeup) and a lockup higher stall converter and good plate type cooler like B&M and you've got a heck of a stout trans without giving up anything. I've done quite a bit of research, email me at macxx1@excite if you would like my notes. Even includes how to pressure lube the output shaft bushing which is a good idea for a highway car with 3.73's or especially lower.