i have a 84 chrysler 5th ave with 318 v8...just replaced starter, alt. batt, and regulator..drove it earlier today, when i tried to start it again it would not crank...just a click from a small box on the driver side firewall. went and got a new one but wasnt the prob..batt is charged and the wires on the starter are getting power, but it will not engage.guy told me it could be the ignition starter switch? located behind the key..i guess it pluggs in...any suggs

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1984 Chrysler fifth 318