5x4" to 5x4.5" dr. diff kit, Questions.

The back of the wheel is in the pic and meant for a rotor with smaller hubs like the second pic i posted. So wouldnt be too bad to machine it down on the nose to slide into the wheel.
Yeah, I was just referring to the fact that sometimes the difference between Ford and Mopar wheels is that the load on one rides on the lugs and the other on the hub. I don't remember which is which as it was something I looked into a long time ago. Maybe just do some research into it as if it is hub-centric and the hole for the hub is machined with the incorrect tolerance to the hub itself, it could cause some issues. Or just machine it out and send it......It will probably be fine either way.