Need a measurement on the reproduction aluminum GN wheels

#1
Would anyone happen to know or be able to check the ID on these wheels, on the back(axle flange) side of the wheel? Wanting to verify these will have the clearance I'm needing before purchasing. Or, if someone happens to know these have more clearance than the stock steel wheels do?
 
#3
Have already read through that info, nothing mentioned about measurements to determine what the limitations are of fitting disc brake hardware inside the rim. It's a simple measurement, and after trying multiple sources for this info I am no further than before.