We don't have a custom fit trailer hitch receiver for your 1979 Plymouth Volare. We are a retailer and not a hitch manufacturer, so we don't make the hitches we sell. I'd suggest you consider having a local fabrication shop help you fabricate an option utilizing something like the Ultra-Fab 2" Trailer Hitch Receiver for 5th Wheel Trailer Frames, # UF35-946403. There will need to be special fabrication to fit your vehicle, but this hitch will get you started. You will also need a ball... view full answer...