Alignment shop - chain store or Mom & Pop?

I rebuilt the front end recently during an engine rebuild, and once the engine is running I'm going to need to take the car in for an alignment (obviously). There's a shop nearby that's a chain, which I take my Tacoma to for tires and alignments, and they do good work. This is my first older car that I've needed an alignment on, so my question is do you guys trust chain or franchise shops to do your alignments? How much different is it to do an alignment on an older car, versus modern vehicles? Is it simpler, or will these guys be scratching their heads trying to figure it out?

Before everyone immediately jumps in and says I should always support the locally owned shops, I always try to. I don't think there's a locally owned shop nearby that does alignments, and I don't want to drive 25 miles on the interstate on a fresh front end. That's the only reason I'm considering the chain that's a 5 minute drive away.
If your control arms have the cam style adjusters than it's no different than many modern trucks. Call around and ask first because some shops wont have specs. As for trusting a chain vs mom and pop, I've found good and bad in both categories. It really just depends on each locations individual crews.