Tappet setting cold is:
Intake: .008" to .010"
Exhaust: .017" to .019"
On these engines, the tip of the valve tends to wear a recess in the top of the tappet adjusting screw over time, which makes accurate tappet clearance adjustment with a feeler gauge impossible. If you now have the engine apart, check for this wear and replace the adjusting screws, if needed, or have a machine shop grind the screw flat for you.
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