ok, on my Charger the main ground point is at radiator core support BUT parking lights is as mostly of cars CHASSIS grounded, being the wired ground really just for headlights.

Can't remember if Cuda parking light housings are plastic or metal AND if the housing gets some good body place to the ground. Will need to check every parking light housing for a propper ground.

Some other laters got a wired ground to reinforce the chassis ground.

Check anyway the radiator core support ground too being the negative battery wire gets that point too and thats a chassis ground reinforcement.

Dunno if rears are also chassis grounded too on a 70 Chally. I know 71/72s Charger tail lights are metal, taking the groung by the chassis, diff than 73/74 Chargers with plastic housings. If plastic, then somewhere on trunk must have a ground place to tail lights and sidemarkers.