'81 blazer/jimmy tailgate

[jfnar]

I just picked up an 81 jimmy roller. It will need lots of work but one of the most glaring problems is with the tailgate. The window is half way down and won't move. When I get time I'll take it apart and see if I can tell what the problem is. My first question is are there any components of a suburban tailgate that interchange? Possibly the entire gate? I don't have any experience with blazers or jimmies so any info will be appreciated. Thanks.