Valve / Piston Clearance in 383

Hi All,

I'm running flat tops in my 383 and 516 heads with 2.14/1.80 valves, Comp Cams Valve Springs and Roller Rockers and Mopar Purple 484 cam. Want to upgrade cam to newer profile and bigger cam but not sure on valve/piston clearance and also going to port and polish heads as well.. Anyone had much experience with cams in 383's or should I do the PlayDoh trick for clearance check...?