toy rear end offset and center registry

i need to know the axle offset and the center registry for a set of disc for the rear, anyone able to pull thei drum off and measure it. or have one apart, thanks.

why not just use the standard conversion parts? also wtf is center registry? won't that be hard to measure with the backing plate on?

wilwood doesnt make a toyota kit so the need for that measurement is important to be matched up with their assembly.