No Les in both cases, I used the pertronix coil that was for the unit I was using. The factory said it worked on their machine, but it didn't work in my truck, which is where I am concerned about it working. The stock units installed in modern vehicles I would have no problem using, as I run them about 200,000 miles before I sell them, with zero problems. The pertronix on the other hand I can't say that.