Thanks for the info Chris's
Been trying to talk to people that actually have run them on their 80's and impressions. I researched lots on-line and a few negative comments but majority positive across various forums (80s, Jeeps, Fords ..)
I talked with Joel (at ThreadWright) regd the wheel on that 80 in Calf from a tire (PO) that blew-out and rolled the truck.
He is waiting to talk to the owner to get the tire and have it independently analyses regd casings v's rubber separation. From the pictures it thought it was casing.