What to look for in an alignment shop?

I just call around local alignment shops and ask if A) they have experience doing alignments on classic or high-performance cars and B) if they will set my car's alignment to the specs I give them. I find usually those two points go hand-in-hand.

It also helps to understand the method; first time I rebuilt the front end on my Duster I took it to a shop for alignment and the guy seemed like he knew what he was doing but it took him forever. After a while he brought me in and explained he was having a tough time getting the caster/camber right because the adjustment for one affects the other at the same time (uhhh really? Thought you were supposed to know that buddy!). He eventually got it but overcharged me because it took so long; some years later I figured out you have to adjust the rear UCA cam bolt as far inward as possible (closer to the car) to give max allowable caster then gradually adjust the front cam bolt until the camber gets to where you want it. At that point the caster is pretty much "what you got", if you want more you need to change parts like UCA bushings or tubular UCA's.

I know a guy with a resto-modded Datsun 260Z built for the race track and he has his own alignment tools so he can change settings at home or at the track, they seem pretty slick and I definitely want some. IIRC I asked how much they cost and it was less than I had thought.