Question on a 1966 Buick Lesabre

I have a 1966 Buick Lesabre coupe with power windows (this particular body style was only made for two years). Today I took it out, put the windows down and all but the driver’s door window went back up. I hear a click when the connection is made on the switch but the motor doesn’t move the window at all (up or down). I tried to use the switch while pulling the window up manually but again it would not move. I am assuming that it is the motor itself which finally leads me to my question; are the Buick window motors universal for 1966 across all models? I have been looking and many models for this year cross reference to sharing the same window motor but I cannot find one that cross references with the 1966 Lesabre.