you can move the booster out and away from the tire and firewall. this is what we did on my brothers truck. if customs has pics on there site (where we got the idea), scroll to the bottom and youll see. def. the easiest fix and there are no problems. i would suggest putting a slight bend in the rod though as its kind of hard to get the clip on the brake pedal. take a look,
http://ifcustom.com/projects/projectspages/a-d/dannysilverado.htm