Valve to piston clearance ?

First my motor is 470 stroked 400 with stealth heads and a 586 solid roller comp. cam and 11.00 cr. I put some playdo in the valve reliefs to check clearance and the the intake side was about .300 and exh. was about .400 with 82 cc heads. Does this sound right, if not what is wrong??? Rockers are Hughs bushed with roller tips.