Quick question guys. I have a set of heads (305ci 416 castings) that I am getting ready to replace the springs on. I was told that the Exhaust Rotators would not hold up to stiffer springs. I know they make eliminators to take their place. Is this a wise idea? They were put on these heads to rotate the exhaust valves but will I see any harm by not using them? The car will be 90% light to light and 10% track.