Unknown RV Camshaft Identification

A lot of those RV grinds were in the 250°-255° seat and 203°-206° @ .050 range with only .420 lift. Many were even smaller ! like 246° seat.
Isky made a lot of those along with Crane. Crane especially was stuck in the .420 range back then, and used a lot of blanks in that lobe range. Lobe centers were about what RRR stated
They gave them catchy names like 'mile-a-more' cams and so on.. As far as the RV stuff AND my memory goes.. that was 40 yrs ago.
IF that's what it is. someone my prove me wrong later. it happens. :)