[SSSammy]

Assuming an FE is an FE, 35 deg is about where you want to be at full advance, when running at 3000 rpm. Idle is probably 15 deg or thereabouts. If you have a mechanical (centrifugal) advance distributor, it has a bushing that is intended to stop the advance at 20 deg past whatever you set it at when idling. I seem to remember this parameter can be changed by changing the size of the bushing. You can hold a light on it while someone works the throttle and watch it go from 15 to 35 as the rpms approach 3000.

The colored springs on the advance mechanism (under the rotor) can be swapped out to control the rpm where the engine reaches max advance .. dependent on intended use.

Sam