I used the Ignitor I in our '41 with a 302 for many years with only one module burn out and that was caused by a bad coil. other than that I had great luck. when our first module quit I tried another that I had for about 5 yrs as a spare. still no luck. Called PertroniX and they said send them both back which I did and they sent me 2 new units at no cost and said check the coil. that's when I discovered the coil was bad.