Mustang 2. Gm brakes?

[skip99]

Gonna do a rear disc conversion using right stuff parts, so it has off the shelf gm 11 " rotors and gm calipers,
I have a mustang 2 front now, I see a bracket that allows gm rotor and caliper on eBay, or jegs.... Pics show it comes with bearings, are these a special bearing with an odd id? The od would be the same as it is a gm rotor...

Anyone used these?

I'd like to just buy the brackets and then get all 4 calipers and rotors the same from right stuff as they would look and be powder coated the same...