Ok, answering my on question hoping it helps others going forward:
Global West says shoot for 5 degrees caster drivers side, 5.5 passenger side; Camber -.5 both sides. Toe 1/16".
Added two 1/8" alignment shims to the rear bolt on the passenger side to bring the castor up from 3.5 degrees to 5.5 degrees on that side. Really easy. This is on a 1969 Firebird convertible with global west upper A arms, stock lower arms, and Global Wests coil spring.
Running 15 x 8 wheels with 215/60/R15 radials up front.
Determined prior "Alignment experts" never adjusted caster/camber! Count your shims before you take it to get aligned. It they do not change in thickness and/or number, caster/camber was not changed and only a toe adjustment was made. If the caster/camber was correct, then the shims would remain the same BUT i find most shops too lazy or unwilling to do the work to adjust the camber/caster in my area (DFW).
In my example, I had 2 shops do an alignment, neither changed a shim, and the rt tire wore out on its outer edge quickly. My check found the caster/camber way off. Everyone I speak with "has a guy" that does old cars and does it "right". I ask how do you know without checking yourself? Most hobby cars have very low miles and a car can track perfectly straight and have a poor alignment eating tires. (just like mine did)
