dual point distributor
.. I dont really get the point of the dual point ignition. Is electronic ign better?
Several things.
The Autolite/ Prestolite dists normally had better bushing life than the aluminum Mopar dists, and I believe the breaker plate rotates on a bearing instead of "sliding" like a Mopar
In other words, better build quality, and usually, better high RPM operation
So far as dual points, they were used to increase "dwell time" --the time that the points are closed-- which helps make a little hotter spark.
You cannot just simply increase on single points because as the points gap close up (to create more dwell) they CAN "go shut" at certain RPM, but because they don't open as far, they will burn out faster. Think of it as the points are "jumping" open at wider gaps
Electronic ignition is of course generally better for reliability, but "back then" there were some awesome work arounds for hotter spark. The big huge rectangular Mallory coil comes to mind. Stuff like "duo coil" (can't remember the spelling) where the system used two coils to fire alternate cylinders. This allowed each coil to generate more spark.
Mallory used to make a real oddball called "rev-pol" which used a special coil.
You'll notice that none of this stuff is around, much, anymore.