Engine dies, but turn the key off and back on it fires right back up

No such thing as a "good orange box" for a few years now. if it s a "stockish" 318 just run the standard factory electronic setup. they are some of the most reliable systems to come out. About 50 years now. If you ever have a part failure. Parts are as close as the local parts house no matter where in the country you might be. As suggested the first thing to do with any type of electrical issue is to make sure that you have excellent connections. Unplug, clean and grease ( dielectric ) all electrical connections and not just the ignition ones. You need a good ground on all circuits. This maintenance item will cure 90% of your electrical related issues. From lights to gauges.