My Hang 10 survivor turns 40 today!

It's scheduled assembly date was May 3, 1974.
Winter improvements include a re-cored original radiator, all radiator & heater hoses, rebuilt the leaking PS pump, replaced rubber fuel lines & filter, tune-up, 4-wheel brake job, trans fluid & filter, oil & filter. The Kelly Chargers look good, but they're 15 years old. So new rubber is in the plan soon. Otherwise it's ready to drive anywhere, anytime.

100% original paint, never any rust, really nice original interior, very well maintained. Before driving home to Cincinnati last fall, it was in the Detroit area since ~1999. Anybody know its history prior to that? I plan to show it in a few Mopar Survivor displays.
Thanks!