Originally Posted by Diesel911

Sorry I did not read what you said closely. "Recently noticed the reverse lights don’t work in reverse." The Neutral Safety Switch also controls the revers lights going on unless the both reverse light bulbs happen to be turned out.

On mine the Engine to Chassis Ground strap is under the car right where the Bell Housing and the Engine Block come together. Which on US cares is on the left side.
If the strap is not all corroded remove the ends and clean the strap and the contact areas on the Block and chassis.