You'll want to get rid of the rotators, they are the retainers on the exhaust valves.
If you have 8 other retainers to replace the rotators, the eddy valve springs are 48 bucks, and work with the factory retainers/keepers.
I was talking to the engine builder Friday and he said leave the rotators in there great they spinn keeping the valve face clean,what do you all thinke of that.