8 HP and larger overhead valves: Intake - .010, Exhaust - .020 cold.
I can email the shop manual to you if you wish.
Rich
Excerpt from that section of manual:
Adjusting valves for 8 horsepower and larger engines
(except valve-in-head engines)
Intake valve gap .010, (.254 mm) exhaust valve gap
.020, (.508 mm) set when engine is cold. Rotate
the engine to Top Dead Center of the compression
stroke, this will assure that the lifter is not raised
by the compression relief pin. Valve stem ends must
be ground flat when adjusting valve gap. An uneven
or concave end can cause abnormal wear to the
valve train.