It's tough to tell everyone what to look for in a teen, as there are so many things to do with one.
I just bought one myself and my requirements were:
1: pre 75 (motor swap and Cali emmisions stuff)
2: Rust (hell hole and longs especially)
3: not hit (straight trunk floors, inner fenders not wrinkled)
4: no electrical bugs (personal hatred)
secondary stuff:
1: decent trans (got a tailshifter
)
2: decent paint (it's a driver, not a show car)
3: an interior (re-upholstery is no big deal)
4: running and driving (makes it easy to tell there are no electrical issues)
I ended up w/ a straight, reasonably rust free 70 w/ a 1.7
Interior needs some work, and the paint is nice from 10 feet. I drove it from Sacramento to Camarillo (only 105 out, take the top off and go) and had no problems.
It'll be @ the GAF this weekend and i'll be happy to show you what I looked at.
BJH