I used the baseball bat trick on mine. It works pretty well. You do it by placing the bat between the tire and wheel well at either the front or back of the opening , then have someone slowly drive the car forward or backwards as you hold the bat and let it roll up and around in between the tire and wheel well. start off with a small bat and then move up to a bigger one if more room is needed. Be aware though you might buckle the quarter panel if not carefull. I ended up using a porter power to pump them out a little more for the size of tire I'm using. You can see pics of them if you like here http://pg.photos.yahoo.com/ph/firebird69racer/album?.dir=dfcc&.src=ph&store=&prodid=&.done=http%3a//pg.photos.yahoo.com/ph/firebird69racer/my_photos
