DEAD 1972 plymouth valiant

You could. It is simple, if you are careful, to make a plate the same pattern as the connector. This will allow you to snap the plate in place using the factory gasket and clips. Punch a hole, find a big grommet. You might be able to buy them from the aftermarket wiring joints like Painless, etc

Be sure to use a big enough grommet with enough stretch that you can add wiring later, like a tach wire, etc, whatever.