To my memory pick up's never had a "standard equpt". rear bumper.
Most owners used a aftermarket rear step bumper. They usually had a Class 1 ball hitch
The Surburban and panel all had rear bumpers as std. equpt. This was a "factory option" on pickups.
They could be had in white paint or plated. They were a close match to the front bumper.
A one ton panel (the 9 footer) would have had the matching heaver rear bumper. But only painted. This is what you probably want.
At least old bumpers were functional, not cosmetic like today.
