A number of bolt’rs including me have had good luck with Julianos for Seat Belts, they have good selection of hardware, buckles, and colors and other options, after figuring all the pieces for a complete install it was the best value, arrived quickly too.
The 5 window will be much different but Photo are the (before welding) 16 ga pieces I formed and slid behind the inner curved panel on the 46 from the door side, it went behind and fastened to the inner supports.. btw: this was done on a finished truck…
Chuck
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Last edited by Hanks custodian; 08/09/2023 11:02 PM.

Hank: 46 Chev 1/2ton shortbed
2023 Miata RF Club