rod.stan

Hello, to give you guys a little info and hopefully make my question not seem out of left field I bought an old GTO off a guy and part of the deal was I would take everything in the storage unit so he could cancel his rental and not have to return to michigan to do it. One of the extra parts was a convertible top on the frame. Now this may seem like a weird question, but I need to try and identify what years this top and frame I have will fit. It was his dad's and all he knows is his dad switched it out for a different one right after he bought it new and he thinks it was around late 80's early 90's. Are there any identifying features from different years that will help me sort this out. I have pics but it won't let my post them here.

Thanks, for the help I really need to sell this to help pay for my project.

rod.stan

Is there no way to tell the differences?? Width of frame, latch style.... anything like that.