Point gap

toolmanmike said

Nope. Dwell is the amount of time in distributor degrees that the points stay closed thus charging the primary windings in the coil. As soon as the points open (break) the coil discharges through the coil wire to the cap, rotor, and to the individual plug wire.

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Correct, and furthermore, the reason for dual points systems is to create longer dwell time (points closed). You can not just "under gap" single points to create more dwell, because one, there is less wear "room" before the points wear shut and stop running, and two, longer dwell on single points causes them to burn because they don't open rapidly enough on the cam "rise." Single points typically have 30* dwell for V8, dual points typically 40-42 or so