Well I'm sorry then Bruce... thats what I get for talking about something I've never worked on.
I have never seen a points ignition where you could not change the gap... (unless maybe old 4 stroke lawnmowers do that... can't remember).
if thats the case... then I guess it IS fixed... (as somebody said above)
if I misunderstood your statement above... and you CAN adjust the gap.. then you CAN adjust the timing...
.. bigger gap equals advanced timing.
.. smaller gap equals retarded timing
(casey says Crisis knows something about 'retarding" )... ; )