The regulators are different shape and size and there is a vertical forward edge track that is part of the vent window frame, inside the door. This would have to come out. The sheet metal on the sill of the doors is different with the vent window door because of a tab which holds the vent window latch. The inside window frames are slightly different as there is a notch cut out of the vent window model frame. Of course the glass is different. IMHO it would be easier to change the whole door if you have access to them.


1949 Chevy 1/2-Ton
"Sedgewick"
In the Gallery
1989 Caprice