I have a '69 post (aka Sports coupe). I want to delete the vent window and was wondering if a non post car would have the door glass I need. It looks close...Thanks for helping!​​​​

My '69 with no vent windows.

 

They use totally different glass. The post car uses the rear door post and wing window chanel for the window tracks/ guides. If you want to get rid of the wing window you will need to get custom glass and make a custom track system. You could probably adapt the window track/ post from a non-post car but you would still need to get custom glass made.