Does anyone know how the rubber mats are attached to the running boards on a B3 pickup?

 

I am supposing that it's a weatherstrip type adhesive. I don't think mine ever had any rubber on it. If I do anything to my running boards I thought I would put that anti-skid, sandpaper-like stuff on. You might also try asking at Pilot-houseforum.com, which is the club forum for 48-53 Dodge Trucks. Maybe someone there has put rubber down on their boards. Good luck with the project and hope to see you on the other forum too.

 

You can also try "vintagepowerwagons.com" Give them a call and see if their friendly folks can't help you. I've used them when restoring my '52 Dodge M37 military vehicle.