dc2-millano-red

I have a set of rrc .25 os piston to us on my k20a build and am planing on running stage 2 cams either kelford,drag cartel or blueprint. Does anybody know if the valve relief on these pistons are deep enough to run these cams efficiently or would i be better off to sell these and go with a aftermarket piston with deeper relief.Head and block will be resurfaced but to a minimum and will be using a oem headgasket.Also may decide to use flat face valves for more comp but undecided on this.