Factory disc brake rotor question

Thanks guys, yes the spare hubs turned out to be for disc so that's good for a spare set. Used studs would need to be pressed into spare hubs. Not sure of the quality of splines left in the hub. I'll blast them and inspect. I'll look for the Dorman #, next size up.
Thanks for the offer Troy, that would be a help. If the damned rotors weren't so expensive to ship, I probably wouldnt mess with these old ones. $65 in shipping alone, for 2 rotors. Either from Summit or Rock auto.
The min thickness appears to be .790 like hemi71x said.
Went and picked up bearing sets Timken SET2, Timken SET6(in stock) and Timken seals 6840S. Not too bad, $80.
Thanks again all!
There was a reason for that step down in diameter also. If a spline in hub failed, a stud with oversized spline was available. Hole in rotor did not need to be enlarged to install.
New rotors may be coated which puts an end to the rust. You might have the hubs blasted and coated too.

Wish you were closer Steve. I've got an Aamco you could use to clean them up.

That's right. I forgot you are in Canada.

20210203_095357.jpg

20210203_095331.jpg

20210203_094552.jpg