fan blade wheels

Hi all, I have an '07 with the stock fan blade wheels and spinners. I'm thinking about taking off the spinners and just taking the center caps out and using them to replace the spinners. Can this be done? Is there any problem with reversing this if I don't like the look? Thanks very much.

Which tire size looks best on 18" fan blade wheels? I wanted to get the staggered chrome deep dish Bullitts wheel and tire package from Late Model Resteration but just spent more money on coesmetic parts so they will have to wait!