That was mfg'd by GMC,
the one that used a old tornado engine set up, ( 455 olds, FWD)
I'll check the GMC site to see what the numbers were.
and get back to you.
I had one of these GMC motorhomes and as the front suspension was the same as the Toranados that they came from, they used the larger calipers which will not fit a G body spindle. Same as full size GM cars.
Marty