i do all of my alignments, and have for many years, because even for only $70.00, finding shops that either can't or won't dial in the specs you want, plus REALLY understand vintage vehicles, the MANY trips back and forth just to get the steering wheel straight is totally unacceptable !
this was, and still is, the situation around here. if it ain't in "the computer", [even if you ask for specs close to any late model sporty car] it CAN'T be done.
now that i'm older, it's tougher than it used to be for me to do, but at least i only have myself to blame if i don't like the way my vehicles go down the road.