1971 plymouth duster buying tips

I'm looking into buying a 1971 plymouth duster that has a rebuilt 360CI V8 4 BBL carb engine with automatic tranny. But i don't know much about cars. I'd be using it a few times a week, maybe 100mi a week, and wondering if it would be functional with that kind of use. It's just an old car so not sure how long it will last. Pics and description at this link: http://www.sandiegoclassicandmusclecars.com/vehicle/3442302/1971-Plymouth-DUSTER-340-Escondido-California-92029
Thanks!