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

To get that much caster take it home and install these:
QA1 Tubular Control Arms if you wanna' spend a lot of coin or have the "cool" factor.

Or get the Moog problem solvers:
https://www.summitracing.com/parts/mog-k7103/overview/year/1972/make/dodge/model/dart

and install them per this thread: MOOG Upper A arm offset bushings.

sb