M4F Specs:
Intake 0,14
Exhaust 0,16
for heavy duty(racing/towing): exhaust 0,18
Warm it up (drive for a hlaf hour not just idle)
and do the valves while hot.
Set it to #1 firing position (tdc) and do:
1,3 and 5 exhaust and 1,2 and 4 intake
Set it to #6 firing position (tdc) and do:
6,4 and 2 exhaust and 6,5 and 3 intake.
Re check after 2000 mls.
your idle speed is O.K.
advance can change from stock with an 0.03 over engine and different cam. Also the gas is different from the one thy sold in the 50es, where the mark on the fly wheel was set. If you change carbs or exhaust you will see a difference to.
Advance it till it pings under load, tun it back slightly and you`r set.
have fun!
Frank