A -Body door window regulators

4spdragtop said
One part will end in even number and the opposite side usually is an odd number. 67-9 cuda regulators are side specific

Are the part numbers on the regulators? The parts book only lists 23-39-5

4spdragtop said
One part will end in even number and the opposite side usually is an odd number. 67-9 cuda regulators are side specific

I would have thought so. One has an M24 stamped on an arm and the other has an M35. I can not find an actual part number. Otherwise they look identical. Any way to tell which side is "even" and which is "odd"?