To start the engine with 14-22 degrees initial timing advance, the engine must have between 9:1 to 9.5:1 compression ratio. If the engine has 9.6:1 to 10:1 static compression ratio, 10-13 degrees initial advance would be correct. More initial advance with 9.6:1 to 10:1 SCR with a short (224 deg.) duration camshaft and the engine would be cranking against the ignited mixture and would be difficult to start.
It is best to lock down the initial advance where the engine starts and runs best. Set the initial advance where it is difficult to start and then back in down two degrees. Set the initial advance with no vacuum advance and idling less than 700 RPM, if possible. If the engine idle speed cannot be turned down below 900 RPM you cannot set the initial advance.