Custom-built gear drive, by Weslake. Distributor itself is probably that old flathead Ford type, but on the other hand a machine shop capable of building that gear drive could have taken any distributor/magneto and modified it to work.
page 78, paragraph 4, "stroking the fire is normal Mallory magneto or a Spaulding..Capacitive discharge system" optical pickup style. Looks like a Mallory crab cap.
