from a few years of junkyard ownership [1872-1986] the ford axle register was 2.740-745 while the wheel center hole is 2.750 -2.765.
the chrysler hub register is 2.800-2.805, the wheel hole is 2.810-2.825.
i have measured these things countless times over the years, and these numbers are for bare, non rusted components. even surface rust will give different results, so measure carefully. rusty stuff will go together, but be a somewhat of a "beach" getting apart. kind of like beating on a tire/wheel assembly or a rear brake drum. we all know the drill for these.
hope this helps.