Not all cars will be able to achieve the ideal numbers, just production line tolerances from 40 years ago.

To whit: I've done alignments on 3 69 Roadrunners 2 stone stock and my own with offset bushings. The one stocker could only reach 2 degrees caster with camber approaching 1 deg positive. The other could barely get 1 degree caster. Mine I could get to 2.5 caster with 0 camber. All 3 had fresh front ends and nothing wonky about the cam placements to indicate accident damage.

Mopar was basically plus or minus a quater inch when assemnling the chassis.