Hi Leo, I'm not positive about the wiring on that car but from what I remember all the power goes to the starter relay and then through one of the bulkhead connectors. Check the ground cable where it attaches to the frame/engine . I would take it off, clean it and re tighten it. Do the same with the positive, just don't connect it to the frame. Also , I know you said the battery terminals were tight but did you take them off and clean them? I've had experience that they looked good but had some kind of buildup on them, almost like they had plated themselves. If everything looked good at these points , check the bulkhead connector pins, on a number of Chrysler products that I have worked on the pins have corroded and on occasion the wire had corroded where it was crimped to the pin, causing an intermitting stalling, no power, or run problem that drove us crazy. Sometimes you can duplicate the problem by shaking the harness with someone carefully watching the lights while you shake them but it doesn't always work. good luck Allan R.