Hei conversion Intermittent start?

I have done 2 different cars with the http://designed2drive.com/ conversions using the Summit "E" coil and had no problems with it. The hardest thing to do was mount the coil. I think you need to take everything apart and start over again, slowly following the given wiring diagrams and a FACTORY wiring diagram to straighten and clean up your wiring. Do what everyone has suggested. Clean the bulkhead connector, add a ground from the battery to the chassis and all the other suggestions. This conversion at best, should have only taken a few hours.