Checklist for body and paint shop

Okay. I've resigned myself to take my 72 Dart in to have the paint and body work done. I have completely stripped the car of all trim and removed front and rear glass. Interior is out except for dash frame and steering column.

I am not looking for show quality by any means. I am thinking an epoxy prime and lower end basecoat/clear coat (ie Nason).

I am seeking input on your experiences with having this type of work done. Questions to ask the shop, what to look for in their responses, any guidance would be welcome. I plan on getting 3 estimates from local shops. All advice welcome. Thanks in advance.