school me on dist

Strange that the reluctor wheel won't pull off. I assume you sprayed WD-40. If you can't get a small puller in there (like for battery posts), maybe unbolt the mounting plate (3 side screws) and use it as a reluctor puller. Either grab it on the sides or thread some puller bolts into the holes (like a steering wheel puller).

Some after-market distributors have the weights on top for easy adjustment, but never seen one for a slant. Eventually, someone may make a general purpose, cheap electronic distributor tuner for a GM HEI module. Rabid Gator was one that was started but dropped. You can do that with full after-market engine controllers like Holley Commander 950 or Megasquirt. Until then, tediously playing with springs and weights, plus swapping vacuum advance modules is the only approach. But I know younger guys would like to adjust their timing via their I-phone.