Did you use the yerm Muncie Trans/ Box because that's what you have to swap?? the earlier trans were Borg Warner and input shafts have been 10 and 26 spline so you might have to change clutch disc also--and if you don't already have a trans your going to use, then look for one with a tail shaft mount and shifter location that's patable with your seat-------do not let the trans hang from the bell housing--------