There is a lot more to the H-M transmission swap. truth is the frame is different as the srossmemners are heavier and engineeered so that trans can be removed from under the truck. Brake line routing different for same reason. Driveshaft length different, Linkage is one-off as well as neutral start switch, shift indicator, solenoid starter, pushbutton for the starter instead of old foot stomper, transmission floor cover which by the way, I would like to find the round cover for the hole in trans cover that goes over dipstick access.