If you drill the ORIGINAL hubs out to the 5 on 4.5 (now you even have the more and cheaper wheels)setting and never have to worry that if you trash a rotor what will happen.
I drilled and tapped for screw in threads my first 2 jobs and then discovered A machinist that did moonlighting as a roundy-round guy and had the jig made to do em in about 5 minutes each for about 12 bucks a hub. that's a no brainer there