Well, they will fit but.... the large plate with the tracks for the rollers is the same size with different size tracks to accomodate the larger rollers on the 68 window frame. Am putting together a low dollar, mongrel 66 cv that I bought on the cheap. I have a set of 67 windows and am using the whole set up. Have done it once before and there was no fitment problems. Had good window adjustment. It's worked for me. Would still look for the right stuff but sometimes the exact correct parts don't materialize. He will have to have the whole 68 window package.