It's possible that the rear shaft bushing is hung up. Normally it can be pushed back to allow the oakie bushing to go all the way in. I just watched a video of someone trying to put an oakie bushing in a 35 Chevy car and he had a problem with a washer behind the seal that was up against a shoulder in the torque tube that was not letting the oakie bushing go all the way in. He had to remove the rear axle/torque tube and get the washer out which allowed the new oakie bushing to go in far enough. Maybe you can use a piece of pipe that will slip over the driveshaft and drive the bushing back into the tube. Did you drill out the pin holding the rear bushing?

The oakie bushings for 1950 earlier trucks that are held in place by dowels I believe are smaller diameter than the later ones that just depend on the press fit. Maybe it's possible that you got the wrong bushing and is too big for your torque tube.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.