Ahhh, the plot thickens. Thanks for all the help. I had even taken a quick glance at my '48 to see if I could see a screw head in that general area. Next I was going to pull the door panel off the '48 to see if I could see how it was attached but I figured the rubber channel would obscure my view but I was gonna give it a try.
The truck is at my shop right now but looking thru some pics I recently took of the Altman latch installation I see a few faint spotwelds that may or may not have the mounting provisions. IIRC, the repro part has 2 holes in the top along the channel so maybe one of them aligns with door. I'll try and follow-up on this thread so some other 'bolter down the road can have closure should they have the same issue.
Last edited by FrankenChevy; 06/23/20246:57 PM. Reason: Clarification
1949 Chevy Panel Truck A Project Journal I'm old but I make up for it by being immature.