Are all 69-73 headlight motors/relays the same?

I am trying to get the headlight doors to function on my 73 Dodge Monaco. I have a few motors & extra relays. I figured a 73 Chrysler 300 motor & relay would be the same however the motor didn't work. I bought a 69 Imperial motor (for $150) & it wouldn't take the headlight bar so I switched the white plastic parts from the 73 Monaco to the Imperial: the motor works but doesn't open the doors. Must they be adjusted somehow? I switched the relays as well: 73 300 to 73 Monaco. I have one...

Are all 69-73 headlight motors/relays the same?
Author: 500cubes