Thanks guys. I already have the complete wiring diagrams as well as a factory assembly manual. I think the problem is that the power windows were added or at least re-wired at some time in the past using a harness from another GM power window car. The relay that was there after I removed the dash was oddly placed using a chrome trim screw, and someone had to jury rig the harness connection because the prongs were a bit different. Also covered with electrical tape. But the "original" connection is there and fits a repro relay.
I also think the harnesses were from another car because the wires don't match the wiring diagram for 1967. On the diagrams all power leads are orange with black stripe. My intermediate harness has red with white stripe serving power.
I may just replace the harness or leave it since the windows do function. Haven't decided yet.