I have a Class III receiver hitch on it, which works fine with my little 6x10 cargo trailer. But the hitch doesn’t have anything to do with a slide-in truck camper’s load...

Thanks for the link to pbfab - I’ll check them out.

Onetimecustoms also makes an air bag system I found.

Bill
1963 C-10 Stepside Longbed
350 V-8, 5-speed manual
Full-time Rver living in my motorhome