Thanks everyone, I checked and the old shocks were Monroe, so I guess I'll try Nappa for the replacements.
59chief,
back in the '80s I had a Jeep with a 4" lift and 33x12 tires, and the Rancho shocks. That Jeep took a beating, and would go ANYWHERE! But man it rode lots rougher than my 51 truck.
Enjoy the dirt!