There is a difference in the 4wd and 2wd frames. Pull Rite makes rails for the 2wd trucks, but not Super Rails.
Ken,
I like the Turnoverball, but Didn't like the Companion Hitch as well as the Pull Rite, since most of my towing is a 5th Wheel that influenced my decision.
The Turnoverball mount is not compatable with the Pull Rite mounts, but the Diamond hitch goose neck is. FWIW
Fireman