UniLite conversion Kit in stock Delco Points Type Distributor.
Only UniLite infrared is not "proximity sensitive" and unaffected by variations in point cam lobes or axial distributor shaft run-out, however minute or otherwise, and tolerates any if present effortlessly.
One "caveat", every Rotor Button used when a UniLite Conversion is in place, must have the bottom square locating pin length / height more than likely slightly trimmed so as to be flush with the pole piece plate thickness to prevent it protruding through and possible distorting or damaging the 2-piece black plastic UniLite "Slot Ring".
On any Delco type distributor, always be sure to remove the drive gear, disassemble, then clean & re-pack the Upper Shaft Bushing Grease Well as the upper distributor shaft bushing is NOT motor oil lubricated.
Was unaware of the upper bushing grease well, and failed to do so on a 1969 bought in 1985.
UniLite conversion installed ~1987 & driven hard for 40+k miles until about 2006 maybe.
Car had been, and still was, running just fine.
Fiddling around one day, Distributor cap off, just happened to notice "clunk clunk"! rotor button sideplay!
That's when the Grease well existed was learned, shaft was ok, swapped housings.
The UniLite using infrared light & not being proximity sensitive never missed a lick...
Nowadays, almost sadly in some ways, "no-name" UniLite Kits are on eBay for $25 total shipped to your door.
Your results may vary, there are many choices & options... and that's a good thing.
The idea of flying magnets going flying always worried me LOL
Peace