Dave, I have a little over 2in off clearence between rock guard and radiator. Do you know much about the zips water pump riser I have a zips but don't know if I can find the brackets for it. Some of the post on deuce den claim they have no problems with heat running the zips. I have a new Walker cobra series that is 1/2 thiner on the floor. I been fight this problem since 1999. I tryed 3 radiator not counting the cobra on floor.,6 or 8 difference fans. I hate to think of how much money I spent trying to cool this car.Thanks,very much for you help Leon