check from back of case to the tranz mount
my 79 MH 727 with a bolt on yoke was 5" from case to mount
car/truck 727 are 7" from case to mount
measure from back of main case where the tail shaft bolts on to center of mount
I had to move the mount to put it in my 85 truck
he can have the out put shaft and tail housing swaped from the SB to the BB case also,to make it right
I thought they are all the same and had never seen any different ones,till I got the MH 727...they are a diff breed all together sometimes
mine had some lugs on top of tail shaft,that stick up for some type of mount that would hang it,I had to cut them off,they hit the floor pan when I set the cab on the frame