Not to hijack but...
...would you get any performance boost with Duraspark and a 45,000 volt coil like the one Wild Horses sells? Maybe it would allow you to open the gap further or will the Duraspark not support that many volts?
Are you saying you alreay have a Duraspark system and just wonder about a better coil? Or are you wondering if a Duraspark and coil will improve over an old points setup?
If just the coil, then it depends on what you've got now. If an old stock coil, then probably yes, a new high-output coil might just improve your spark and therefore performance/economy.
No guarantees of course, but in my book it's almost always worth an ignition upgrade if you're running old original stuff.
Will you feel it with more HP? Maybe, but probably not. But it might run smoother and get a tiny bit better mpg. You never know.
And yes the Duraspark can handle lots of voltage. That's what the large diameter distributor cap is all about. The electronics, like the trigger and the module, shouldn't care one way or the other how much voltage your coil develops.
If you meant upgrade the whole setup to Duraspark. Hell yes!
Duraspark, HEI, Pertronix, ACCEL? Any of the above is better than points.
I happen to still like points (in their proper place), and can still gap 'em in nothing flat. But they'll never hold a candle to a good modern electronic trigger for spark output and reliability.
Oh, and the big thing? YOU NEVER HAVE TO ADJUST POINTS AGAIN.
Priceless.
Just changing to electronic even with the same coil will increase your coil's output voltage. It's the "speed" of the switch (points, magnetic, hall-effect, optical, etc.) that helps determine a great deal of how well a coil works.
And did I mention that you never have to clean/change/gap points again?
Hope that answered your question. At least sort of anyway.
Paul