Tronman - After reading your response I went back into his previous posts to see what other pictures of his truck might reveal about the wheels. Zoomed in screen shots from some of his other pics appear to indicate the front wheel does have a split outer locking ring that is the outer tire bead seating surface. I think these are actually 2-piece wheels that look like the Goodyear Type "LW-LWB" as the wheel does appear from the other pictures to have a "split" outer locking ring.

The zoomed in pic of his rear wheels does not show the telltale 2" wide ridge where the two halves of an RH-5 rim would mate up from what I can tell.

svcattle can let us know for sure or not if the wheels actually have the split outer bead lock ring, but I think he most likely doesn't have RH-5's.
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~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)