all V8 AOD's are the same internally. V6 AOD's get one less clutch in the direct and forward drums because the motor makes less torque. AOD's behind HO equipped cars got a High speed shift govenor, rated at 4800 rpm, non-HO AOD's got a low speed govenor rated at 4200 rpm, trucks got a medium speed govenor rated at 4500 rpm.
the only other difference is the shift levers, floor shift cars got a different shifter lever than column shift cars/trucks. you can easily swap shifter levers.
Town cars, mark 7's and most trucks got a 1.5" longer out put shaft and extension housing, these will NOT work in a passenger car unless you modify the driveshaft or swap out the correct output shaft, which requires pulling the trans apart.