No Start, ignition and ammeter problems

As long as your battery is good, you should almost never get stranded for an electrical fault. Just carry a few parts, tools, and knowledge. You can directly apply 12 V to the starter solenoid to turn over the engine (in any gear, be careful). You can wire 12 V directly to the coil to get spark, though you will need a ballast if a factory Mopar ignition or the coil will overheat in ~5 min. Always carry a spare ballast.