Front markers are working correctly now. They werent designed to be on when the headlights were on, but only when the headlight switch was turned to park lamps.
On the headlight switch, you can move a wire to achieve this . I will eclose a photo.
My 64 does the same thing...I am going to change it also.
Try jumpering these two connectors where the little spade is across the two terminals first to be sure it works.
Fact is stranger than Fiction