Thanks, everyone for your info! The original motor was a 350 V8 and it had a two speed power glide trans. The body shop told me that they saw evidence that it had original hideaway headlights, which may indicate that it had the RS trim package. They also told me that all of the badge markings were present, but had been filled in at some point. They redrilled the holes and replaced the badges.
I'm having a new carborouter and manifold installed this week. A mystery issue I'm having is with the wiring. I haven't had it looked at yet, because I haven't driven her at night. When the lights are on, and I hit the break, the tail lights go out. Hopefully it's a simple fix.
I'll post a pic of the manual in the windshield was in the trunk when I bought her and the 400 V8 engine with some of the shiny new parts I replaced