WRONG LOWER CONTROL ARM SHAFT???
All A body Lower Control Arm shafts interchange from the 1962-1976 cars.
The earlier years used the style ball style machining on the shaft, and the later years were round diameter.
The only other minor difference if the shaft used a castle nut, on the threaded portion of the shaft, then a hole was drilled for a cotter pin.
The one without the drilled hole is for a lock nut type of fastening nut.
You haven't removed the bushing "shell" that's left on the shaft.
Your not getting the torsion bar in, has got Nothing to do with a bushing on a lower control arm shaft.
All A body Lower Control Arm shafts interchange from the 1962-1976 cars.
The earlier years used the style ball style machining on the shaft, and the later years were round diameter.
The only other minor difference if the shaft used a castle nut, on the threaded portion of the shaft, then a hole was drilled for a cotter pin.
The one without the drilled hole is for a lock nut type of fastening nut.
You haven't removed the bushing "shell" that's left on the shaft.
Your not getting the torsion bar in, has got Nothing to do with a bushing on a lower control arm shaft.