To follow up on this thread, I took a good look inside the door for a hole at the top for the guide (see picture) and low and behold there was actually a small one on a clip at the top of the door in the general area (see picture). I then took the aftermarket guide and mounted it into the door using the lower two screws. The guide actually extends quite a bit above the hole (above the lower window lip on the door) and I could not tell if the existing hole in the door aligned with the second hole down from the top in the guide. From what it looks like to me the clip inside the door that has the hole for the top mount looks to be joggled right above the hole so the guide sits flush with the upper part that is integral to the door. It seems to me that I may have to trim the guide to fit in this recessed/joggled area and then if the hole in the guide doesn't match the hole in the door then I'll need to add a new hole to match and possible weld up the old hole if it is too close to the new hole. I'm gonna disassemble my '48 and see if I can get a good look at that area before start cutting parts to fit.
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Image00002.jpg (56.46 KB, 37 downloads)

Last edited by FrankenChevy; 06/28/2024 5:13 PM. Reason: clarify

1949 Chevy Panel Truck
A Project Journal
I'm old but I make up for it by being immature.