Wow!,
Thanks for all the help. I started this post only a few hours ago and members have jumped right in to help (as usual).
Rick,
I will run the test you laid out tonight. I don't thnik it is the box, but it may be a wiring or ground problem. I'll keep you informed.
deadwood1584,
I have checked the wires to the distributor. They match the colors you specified. I will be calling MSD today and try to see what they think.
I am really stumped. It almost fires everytime. It's like it only fires 4 of the 8 cylinders while cranking. I am sure the timing is correct and I was on the compression stroke. I have checked the wires many times and they match suggestions here and in the instructions. I have a solid ground to the motor and frame. The coil is firing. Should I check anything in the distributor? Not to sound crazy, but the firing order is 1-5-4-2-6-3-7-8 for a 68' 428FE right?
--Mike