Fully adjustable upper A-arms for ‘67 Barracuda

It is negative caster, I know how to correctly put offset bushings in, I did alignments for several years at a shop & understand suspension geometry. I’m not doing a pro touring lowered car, it’s not at all the ideal set-up, I’ve got fenderwell headers, short 24.75” tall tires & need it taller than stock height.
So you are setting your caster backwards to make clearance between your tire and the header?

Your statement about pro touring lowered cars is a bit ignorant, ya think? ALL of these cars benefit from more caster. Until recently, we just didn't have the parts to achieve modern numbers. An experienced guy like you should know this.