318 Magnum first fire...timing?

What ignition are you using ? There are two wires on your engine harness one dark blue and one brown one gives power when cranking and one gives power while key on (run) they are connected together so you maintain ignition power during and after cranking. What you did may be right. You should be able to search something. Check your wiring diagram to make sure on colors but I think I'm correct.
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