93 Ramcharger suddenly died

You say it shows no codes, as in none at all? It should have flashed for "End of Codes" at the very least, even if nothing was in the recent history.

Which makes me think there's something there with the ECM, possibly a corroded connection, bad ground or broken wire. Or in the worst (but most common) scenario, the ECM itself...

Another thing comes to mind, the ASD Relay, if it fails (or receives a bad connection) you instantly lose Spark and Fuel. I've seen that a lot, it generally is a bad relay or a broken wire causing ASD issues.