It has been a while since I did my '88 Pace on a P30, but I believe I had to pull the axle to get the hub off. I would suggest not turning the rotors, but replace them. The thinner they get the less heat they can absorb and the will warp sooner. They have a slight press with the hub and have to be tapped off. Chevrolet has a RV chassis manual with a lot of good service info in it. I got one at no cost by calling Chevrolet. Good luck!