Alignment shop - chain store or Mom & Pop?

Ive been weary of most of the big chain tire store shops since one of the alignment kids stripped an adjustment bolt trying run up on of my torsion bar adjuster, using his air gun with the weight on the suspension.
He admittedly didnt understand the torsion bar design.
So, if I can speak to a guy in a Mom and Pop shop first, I can get a better idea if they understand the older Mopars.
Plus most decent Mom and Pop shops will let u hang around while they work on your classic car.
Big stores wont let you past the chains. Lol