Distributor Pickup test

[1] There is a magnetic [ pull ] every time a reluctor tip goes past the pole piece, which contains a magnet. If there is any slop in the system [ dist shaft worn, pivot holes worn etc ] then contact might be made.....& then no spark.
I do not think your problem is p/up related....& never did from post #1. They are extremely reliable until the wires break from vac adv flexing them.
I would try another coil.