Ignition dwell and adjusting it.

A dwell meter is best. The spec is 28-32 degrees of dwell. Hook the meter up with black to ground and the red or green wire to the negative side of the coil.

Remove coil wire so it will not start. Remove the distributor cap and rotor. Have someone spin the engine and watch the meter. It will register dwell in degrees while spinning. It if needs adjusting, loosen the adjusting screw and adjust the points using a flat blade screwdriver in the adjustment slot in the breaker plate to either open or close the point gap. Zero in on 28-32 degrees while the engine is spinning and lock it down. Put it back together. Done.