I have a GMC that uses the same fenders and 9's have plenty of clearance. If your bed clearance is so close that going from 8.25's to 9's makes a difference, you are too close any way. Are you in a rural area of NE. There are still lots of bobtails that are only used during the harvest and almost all of them have tube required tires. Look around and I'm sure you will find someone to change them reasonably. What kind of wheels are the 10 hole? I'm looking for some to replace the Firestones on one of my GMC's.