I used the window glass frame to make a plywood pattern. I first measured the rear channel length, from the elongated slot that a clip on the old channel locked in, this gave me the approximate height, after forming I used several sheet metal screws thru the channel into the door frame, I think #4x3/8. Small enough that they bury themselves in the fuzz. I think Alan Horvath has a web page on the later models with wing windows. Zeke
