Re-Wiring 1975 Plymouth Duster

Mattax said
An original option that is critical to know is whether the car was originally equiped with a defrost grid for the rear window. Those cars came with a heavy duty alternator and battery wiring arrangement. One clue will be the rear window itself and/or the switch to turn it on. The other clue will be a grommet in the firewall with some large wires.

it was optioned. Does it have the rear defrost grid? Does it still ahve the fender tag?

We see some modifications but a lot of factory still there as well.