stock wheel size

[jocko]

Good evening truckers.
anyone know the stock steel wheel size for a 65 C10? (dia x width)
(I'm looking at a decent 65 short-wide, has some aftermarket wheels on it now, I want to go back to stock steelies)
anyone know anyplace that sells them?
(i could only find something close at stockton wheel and wheelsmith - but they don't have the openings between the center section and the rim, they're completely solid - I'd prefer actuall oem stock wheels if I could find em. Will scour the junkyards, but wondering if anyone makes them new/refurb)

also, are the stock steel wheels set up for a 10.5" dog dish hubcap or 12"?

considering a cpp front disc brake setup, a little concerned about caliper interference, but could add a spacer I suppose.

thanks,
jocko