1961-1962 Chevy 2-Door Hardtop Bubble Top OEM LEFT Quarter Window Front ChannelThis original 1961 1962 Chevy 2 Door Hardtop LEFT DRIVER'S SIDE Quarter Window Front Channel is for a Bubble Top ONLY. Some channels may have the adjustment screws still attached. In the early production of the 1961 Bubble Top, GM produced only the front channel guide which is slightly shorter than the later production (see photos). But this produced problems when raising the quarter window and so later in 1961 they produced a second rear channel to