Slant six? The old Darts where one of the best cars made in America in its day.

As long as the body work not rusted away, repairs are simple, quick and inexpensive.

A 1972 Dart will make a great weekend car and Corolla will a dependable daily driver. However a Fiat Chrysler Dart will be only be good for a very expensive greenhouse

Aside from rust in general, pay careful attention to the condition of the torsion bar anchors. If those rust out it's a parts car. Rust is the biggest caveat with those cars. Engines and transmissions on the other hand are long-lived and difficult to kill, and unlike modern cars are feasible to rebuild. A 1972 model will have ignition points (unless upgraded to electronic ignition) and the distributor is a little tough to get to on the slant-six. The 318 V8 was a popular option.