Tips on inspecting/buying a 40 year old car?

As someone from California, I think $5,000 is a little high.

$4,000. And mention the brake safety problem. You fixed your brake problem on your Duster that would have cost $400 for a shop to fix. And "suspension and such bounces like the cruiser she is"... The needs shocks and suspension work. Another $400-$600 for a shop to fix. Drive it first. Note to your self how bad the suspension is and brakes. If its worse that described, mention that. If it's not as bad as he states, re-state what he said. Then mention the itemized cost of brake work and separate cost of suspension work. Let him total the two in his head, because saying it needs $1000 worth of work total is too overpowering and will make him standoffish.

It's a column shift, 318, A/C, bland color, bench seat Scamp. Not extremely desirable combo. And since this will be your second (at least) Mopar at the moment your in the seat to deal. Play it cool.

Unless you plan to replace your Duster with this car cause this ones in better shape?

Is that the picture or is there something going on in front of the driver rear wheel molding in the 3rd picture?