picture of inside of a Pertronix dist.

Jumping back on this thread to say I did install the 1385LS in my IBS-4013 distributor. This is the original ignitor, before the 91385LS Ignitor II came out. It's my understanding if you have a fairly stock motor and don't need the advanced features of the Ignitor II this one will save you a little money.

The CW and CCW vacuum advance pins are not as clearly marked. I'm hooking up to the pin nearest the CW, but don't understand why the CCW isn't next to the other pin.

View attachment 1716341797

That is odd, the CW pin is the one to use, but why did they stamp it like that? Maybe a call to Pertronix would explain it, then again it depends on who you talk to there.