That's a test I do and I did on mine when I took the ballast out of mine with the super coil and orange MP ECU. I let the car run about 15 minutes and then drove it for over a 1/2 hr and then lifted the hood and felt the coil. I knew if it was real hot it I would not like that and would put the ballast back in but it was so cool that I was surprised to see my ign coil that cool after 45 minutes of running time. I had heard of guys running MP ign ECU's and no ballast and I figured I would try it. And I have now been running my 63 like that with the MP orange ECU and the Acell super coil and no ballast for about 5 years. Ron