Joe D, Gump,
My guys say check for poor grounding of the distributor at or near the intake manifold.

Also, if you can use Motoview to monitor RPM during crank to make sure you are getting a clean signal from the crank sensor. If you're not getting a clean RPM signal, it may be disabling spark until it sees a clean signal. I.E. software will not enable spark until it sees a RPM above 100 RPM.

Hope this helps, Forklift Fan