Well THAT IS NOT true either. Mopar single point dist. are some of the worst OEM design I've seen. GM generally was some of the best. I used to buy the little bushing kits you could buy "back then" for Mopar single point dist.s 3 or 4 at a time. Shaft play, spark scatter, change in dwell with vacuum advance, those are NOT an HP design.
Generally the tang drive is not a really good plan. There's been all sorts of bushing/ spring loaded/ thrust add-on nonsense over the years to try and reduce spark scatter on Mopar dist's both SB and B/RB
