improving cluster lighting 64 cuda.

…Oh, and one other thing needed to make this work: On (most) pre-1968 vehicles, the parking lamps do not remain lit when you turn on the headlamps. For 1968, this was changed so the parkers stay lit with the headlamps for safety (in case of a headlight burnout you still have at least some visible light on the burned out side of the car). This is easy to retrofit: remove the headlamp switch and unplug its multi-wire connector. Put a short piece of 18ga wire between from the "P" to the "R" terminals on the headlamp switch body, right down at the base of those terminals. Make sure the ends of the jumper are neatly tucked so they won't touch any adjacent terminals. Solder if you like. Then push the connector back onto the switch, on top of your new jumper wire which won't get in the way, and reinstall the headlamp switch.

Or, if you prefer, find the two wires corresponding to those terminals and put a jumper across the wires themselves. It's best not to use the fold-over-and-crunch "Scotchlok" type taps. Much better, more durably trouble-free result if you use Posi-Taps (get this assortment and you'll quickly find uses for every piece).

Either way, this will emulate the wiring setup of '68 and later cars that keep the parking lamps lit with the headlamps on, and allow the DRL switching logic to work correctly.