Remarkably, the 47-inch Growlers cleared everything at full turn in the front of the truck. Even flexed out, the front tires really didn't rub badly. Unfortunately the rear was where the big rubbing was going on. We added the JT's wheel spacers and some bigger blocks to the rear end, but we were afraid the rear fender would still grab the tire when really flexed out.
Out came the Sawsall as we cut and hacked our way to some better tire clearance. We could have tried to completely remove the fender flares, but we decided that cutting along the bottom of the fenders would be a better way to clearance everything.