Dumbfounded. 340 will not start.

do not run that dist/coil from the old ballast supply (blue)(etc) wire. I garuntee there is too much resistance in that circuit and the voltaqge is not high enough. I would wire in a relay and run something off the batt. There is too much resistance in the old wiring harnesses, especially after this much time. make sure you got a good alt too as you will need one.