Just bought a input shaft nut wrench for the muncie transmission fits the muncie m20,21,22 and our 3 speeds. Cost about $15 delivered. It is a thin spanner to fit on the skinny nut between the oil slinger and the front of the main bearing of the trans.
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