People did something similar years ago, with the Vega and Monza upper control arms. They would make a pie cut in the arm and make a spacer and weld it back together. There are more options now for A bodies than before. With the new lower control arm bushings and adjustable strut rods, I have not had a problem adjusting more positive caster. But I have a problem child with my 72 Duster, being previously wrecked, the alignment is way off. Once I straighten out a lot of the problems, I will see how I make out.