My new 71 Dart and the issues I am finding. Help needed please

Since you are limited doing a lot of work on the car by yourself, I highly suggest bringing that car to a trustful body shop or mechanic and have them checked this car thoroughly. I think it is better paying a few dollars now and having somebody taking a really close look at the body, brakes, suspension, engine etc.
A good deal rarely exists nowadays. I just want to make you aware that this good deal can easily turn out to be a money pit. I am very sorry to write that, but I am afraid that this is a flipped car. If that's the case I would pull the emergency brake and either return it or sell it.

Wolfgang