If one wire was bad, there may be more, but they aren't showing up until power is applied. If it were mine, I would do a complete tune up, points condenser, plugs, wires, and have the coil checked. The timing should be set at the first slot, which is 5 degrees BTC. Centrifical advance should be 24 degrees, at the crank, at 2200 rpm, and maximum vacuum advance should be 24 degrees (crank) at 13-16 inches of manifold vacuum. I hope this gets you going.