What years did they have the 2 pc rotors for the single piston calipers?
Are there any part numbers of date codes on these?
What is the minimum thickness that can be turned down to?

70-72 B&E used the KH set up. The disc is 10.98"dia, 1"thick, .94 is the minimum thickness. The hub/disc is 4.84" tall.

I hate to hijack this tread but does anyone make a replacement disk or complete 2 piece rotors for restoration purposes?

I have a pair of disks that are worn out but kept them in case I could get replacement rotors to install on the hubs.

If push comes to shove, you can use the later 73 and up 1 piece rotors with the original calipers. You will need a bearing spacer from Dr. Diff though, due to the larger inner bearing of the later rotors.

One piece rotors were available.

Maybe as aftermarket replacements, but not from the factory. If they're going on a car that will be driven, the one piece are way better because the 2 piece ones would warp to hell and back with hard use or the ding dongs at tire stores with air guns.

I have a pair that may be in-spec if anyone is interested.