[user removed]

I think the weak point in that ignition system is the module that converts the ignition signal to a ground that creates the spark. I believe it is located in the distributor. Although the distributor may not be the problem, just the module, a quality remanufactured distributor may be the best choice if it is determined to be the problem, even if it is the module and not the whole distributor. We used to wrap a wire around the antenna and run it to the coil wire which creates a lot of ignition noise (radio on AM band). When the module got hot enough and broke down the static in the radio would get less and less until the ignition signal had deteriorated to the point where no spark was produced.

regards
Mech