Easy test Scoot, Set your lash with the motor hot, Let the motor cool, till it's dead cold, and check them again. don't reset them. Fire the motor and let it come to operating temp. again and check them one more time. Don't touch the adjustment, after you set it the first time. I'll bet the flea circus, it'll be tighter cold, especially if you have aluminum heads. I set mine, .022 hot, or .018 cold. samey same. Scooter, don't tell no one, I learnt this from an ex Ford mechanic.