Alignment shop says they can't get over 1 degree positive caster on 73 Scamp

Usually with these cars, there is one of two scenarios. Either you can get the camber you want, or the caster you want, bot not both.

This is because the front frame rails are not supported well and can twist in at the top when viewed from the front over time. This is why additional caster is needed.

If the car has been pampered its whole life, sometimes that's not the case. But these cars were not to last fifty plus years. Years of pounding through potholes, over speed breakers and any and every other imaginable bump and jolt the suspension takes through time.

A cross member ahead of the engine attached at the top of the frame rails could help this problem, but Chrysler didn't deem it necessary.

The offset upper bushings are the best quick fix, although the absolute most correct way would be to "untwist" the front frame rails and reinforce them.