Exactly as DADS50 pics. The screws inter holes on the bottom of the side sill of the cab, go through the rubber seal, than screw into the metal retainer. Shown in Sect 1, Sheet 3.10 in Factory Assembly Manual.
I used #10-12 x 3/4" Square Pan Head Sheet Metal Screw Type A, 18-8 Stainless Steel to attach the seal.
> Fastenal #29971The square drive screws are much easier to use than Phillips and they kinda look like the rusty clutch head screws that I removed. Stainless should eliminate future rust.
I bought new metal retainers from Chevs of the 40s rather than sandblast, epoxy prime, etc. my original retainers. I shot an extra coat of paint onto them before I installed them. They fit fine.
> Chevs of the 40s #3685433B 47-55- Lonnie