I don't to be honest I've never looked, I just know that if you've got older axles i.e. with drum brakes on the rear you have to use spacers to fit alloys
I had this issue many times over and over. It's the half shaft oil seal. new caps are also a must. If the surface of the drive flange is also damaged it would be worth replacing. As far as i know the alloys do fit the older rear axles. I had some 'freestyle' alloy wheels and they fit the drum braked axle but not the front axle (RRC one) with bigger hubs.