If he has a sm420 trans, for an open change-over, he would just need to remove the rear yoke assembly off the trans, get a 55 or later open style rear bearing retainer and install the seal and find an open input shaft, no removal needed.


1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration