The mylar glass channel runs as pictured by the OP will not work for the 62 to 65 B-Body applications. The mylar runs were used from 1966 up through 1993 on a wide variety of applications. The mylar channels actually attaches to the door glass and moves within the division bar as the glass goes up and down. For the 62 to 65 applications, you will need a glass channel run that is similar to a velcro type of material that is glued to the division bar. Some of the glass shops may sell it under the mohair listing. It comes in a variety of width and thickness and you just purchase the desired length. Relatively inexpensive. A good glass shop or restoration supplier will stock the material.