Piston to Valve clearance!! Help!!

what pistons do you have? but yea you definately need to check it on your own. the best way to do it is to take a used head gasket and bolt the head on the block with clay placed around the valve reliefs in the piston and turn the motor over. if youre using hydraulic lifters check to see if they are staying pumped up and that they are not collapsing.