What interchages on 63-66 dart

most of those cars are one year only front ends. you can swap the complete front end out from a 66 to a 63 (might have to get the rad support also. doors swap but the lock (63 skeleton keyhole type lock hole vs 66 round hole) door latches are different too between 66 and others. other minor things are different. I've seen a valiant convertible door on a dart hardtop (wing vent pot metal is different though) 66 is supposed to be narrower than the 65 in the bucket seats. All the windshields will interchange (check and see if your clear or a light green tint. with or without the top band but the shape is the same) you can use a hardtop windshield gasket in place of the pricier and just a bit harder to find convertible ones, since there is just a minor INSIDE flange difference. here is the link on my measurements post #5 63-66 Dart Windshield Gasket Source?. 65 trunk lid can fit on the 66 and you can use the 66 lights in them if you open up the 2 bottom holes in the trunk side. heck you can put a valiant front end on a dart if you have the complete front end. I don't think the 66 trunk will fit with the 63 design since the 66 has light in the trunk where the 63 does not. (or you could confuse the devil out of them and make the quarters fit the 66 lights )