Glad to hear that Harold. I spoke to Pertronix and two diff people gave me diff answers.
One said Mag Ring, the other said Lobe Sensor, if there a dwell window in the cap.... "The 91181 is best used with Delco distributors with a dwell window in the cap. If you have a dwell window use 1181..."
This made no sense to me whatsoever. What's a "dwell window in the cap"? I know what dwell is, mostly, (referring to spark value), but what is he saying about a "window"?
In any case, I got the mag ring version. seemed the safest bet.
Side note: they also say on the Pertronix site that you can use your existing coil. Au contraire....the tech told me that my coil (1.5 ohms resistance) is too much, and that the Ignitor II needed .60 max. Maybe he was selling me a coil, and it worked. I figured make it a system. Eliminate questions.
UConn.... I'll repost once I get it installed and tuned. It really couldn't be simpler, but for the Magnetic Ring version you apparently do need to pull the distributor. Lucky for me, it's already out from a refurbish. I'm expecting far more consistent function and better efficiency. Also the Ignitor II has an "adaptive dwell" characteristic which should help at higher RPMs. This is part of a retune, so still need to play with the mechanical advance timing, but eliminating likely points issues helps me focus on carb issues. I hope!
'68 400HO Coupe, 4 spd, 259 interior, Windward Blue. My other car's a Johnson 15 outboard on a '61 Starcraft rowboat... Just sayin'.