I have 2 62 Chevy sets now with the chrome bead and the felt channel all as one piece.
I have a 63 that I am finishing right now, and I just got through switching the vent windows and existing channels.
I note the the chrome and the felt appear to be one piece which is not the case for 62.
For 62' the replacement channel chrome bead and U shaped felt are all one piece about 2 ft long.
I note on the 63 that the upper part of the felt has square holes cut in it to mount the felt to the vent metal frame in addition to the rivits.
for 63 and 64 this appears to be the right channel. It looks like it does not have a chrome bead and appears to be a rigid straight piece( I think you need a rigid piece
to fit in the channel correctly since the channel on 63 is the same as 62's)
http://www.lategreatchevy.com/full-...frame-vertical-window-channels-1963-1964.html
Paul