Ok on my 1949 GMC 150 I have ran into some confusion on which type of windlace my truck needs. The issue is it does not have a channel or any screw holes for the other style retainers. The cab appears to be all stock and dosent seem to have had anything done to it. I was told to look for any previous spot welds that would have held the channel to the cab but im a little confused on exactly what area they would have been. I see no spot welds that were on the i side of the cab. Only ones i have found in the perimeter were on the outside of the cab facing the door. I will include some pics. Thanks for the help guys.
