340 x head

Guy's i was wanting to know what the valve stem height above the keeper is supposed to be?
Had to replace one head and the valve stem height is different on the original head.
it 8 thousandths to 12 thousandths on the replacement x head and around 12 to 14 thousandths on the original head.
We put it back together and have one rocker ticking.
Checked cam for wear and also looked at lifters and the only thing we noticed was the valve stem height from one head to the other.
We were curious what those tolerances should be.
Thanks !


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