No instrument gauge lights or push button lights - 64 Dart

I'm not sure a 64 is wired the same as later models. Do you find one fuse that doesn't have power on either end of it until the park lamps are pulled on? Labelled "inst" maybe. That's the illumination fuse.
There is a way to ad a jumper on the headlight switch bypassing the rheostat. Full on dash lights at all times. The last new switch I purchased was about $13, so a jumper may not be worth the effort.