HEI Ignition gurus Help!

Like I said "ragged edge." Maybe the dist is not producing enough trigger, but the 8 pin doesn't require quite as much. Maybe the 4 pin "loads down" the output of the dist just a touch and for some reason it just can't supply enough. There are lots of us who have/ do run these 4 and 8 pins and they generally run great.

I've spent large parts of my life in and out of various types of electronics. I'm no "expert" by any means. But there are things that happen that you just cannot "box up" into a package and claim X or Y

Why do some timing lights "not like" MSD? That type thing