Get the right hieght specs and measurement locations copied from a FSM for the year and model. Its rare for a shop to have those.
If they go by the original Caster and Camber, those were for high crowned roads and bias-ply or cross ply tires. If your roads are fairly flat, have them set both sides the same.
Tell 'em its a power steering car (even if it isn't) as those originally got more caster.