I choose to modify the distributor housing to run a needle bearing at the top, and a hardened steel sleeve pressed over the shaft, ground for a wobble-free fit. Either a grease fitting or the original cup can be used to keep the bearing lubed. That eliminates the need for the disc and spring, and assures that the point gap stays consistent at least until the rubbing block or the cam wears.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!