A reluctor is anything use to upset the flux field around the coil on the pickup coil. The Chrysler style pickups are biased by a built in magnet. So the reluctor need not be magnetized in order to work.
If you use a distributor you can mechanically distribute the trailing ignition which is required.
Or,
For crank triggered:
If you fire both leading and trailing in each housing at the same time, then you need two pickups 180 apart, but only one reluctor. The reluctor can be a steel pin sticking out of a disc. Or a screw sticking out of a front pulley. One pickup fires both plugs in the front housing, and the other pickup fires both plugs in the rear housing. You use double ended coils, or two coils, one for each plug, if you like.
This avoids the need to distribute the trailing ignition with some other mechanism.
I used an early front pulley with the 4 bolt holes. I built a thick aluminum disc. At the edge of the disc I drilled a hole a bit smaller than a 10 penny nail. I drove the nail through the disc and trimmed off the excess. I reduced the diameter of the disc until about 1/3 of the nail as exposed. 2 pickups one reluctor. The pickups can drive a MSD or a Chrysler amplifier.
(you would need two).
This works so well it is amazing. Put a timing light on it and it looks like the engine is not running.
I added a Mr Gasket degree wheel over the disc for timing adjustments. Very nice piece I must say. My camera bought the farm last night. If I can find that crank pulley I will publish a picture, with a new camera.
Or I can draw a picture..............
Lynn E. Hanover