hi again zincyellow my only concern would be the six cylinder trannys usually have fewer clutch discs (I'd have to check this to be sure though) in them (ford likes to keep costs down by putting just enough parts in just to get by) by the time you upgrade all the drums inside the tranny to use more clutch discs (stock # of discs most likely would not hold up to built cleveland) you might be better off finding a tranny out of a v8 application trucks have typically had bigger drums more clutches in them...especially f150,f250,f350 4X4s with aods or look to aftermarket lots of mustangers have had good luck here with lenco stuff I know there costly but so is tow truck drivers who don't take care with classic mustangs..I'll try to find more info on 3.8l tranny later in the week (as to # of clutches...not sure if our parts listing will tell me how much discs are needed....shop manual would if could only find it!!) hopefully I'll post again soon