Note:
One thing that may he helpful is to have your crankshaft pulley marked with the degree marks required for the distributor on your engine.  I use a 009 (it has a centrifugal advance instead of vacuum advance which I am told is better to use) which needs to be set at 10 degrees BTDC at idle (800 - 900 RPMs) and should pull  to 28 degrees BTDC when completely advanced.  To check the pull, rev the engine with your timing light attached.  The 28 BDTC mark should be to the right of the 10 degree mark.  The 28 degree mark should pull from the right and stop at the engine case split.

There are two methods of setting the timing.  Static timing and timing at RPM.  I choose static.  For a 009 I set my static timing to 10 degrees BDTC then I ensure that it runs out to 28 degrees BDTC at 2500 RPM.

Another method of setting the timing is to set it while at RPM.  Rev the motor to 2500 RPM and then set the proper amount of advance.  28 Degrees BTDC.  You may run the engine with more advance, but this will cause the engine to run hotter, and not last as long.

1)    Loosen the distributor clamp.

2)    Connect timing light.  The induction unit should go over the number 1 cylinder plug wire.  Then connect the plus lead to a 12 volt source (I use the 12v lead on the coil).  Then connect the ground lead to a grounding point.

3)    Start engine.

4)    Rotate the distributor to set the desired timing.

5)    Tighten distributor clamp.

6)    Recheck the timing to ensure distributor did not move when tightening the clamp.