Anywhere from $1000 (Incomplete parts car) to $40,000+ (Restored Trailer Pig).
Average complete "restorable" Chargers of that era are few and far between, with a 4 gear, harder yet to locate.
I'll get out on a rotting limb, now. :helpme:
Figuring it's a complete 4 gear car needing they typical trunk repairs, quarter work (or replaced) and a non-runner, around $2,500 to 7,000, but that's with most every hard to find knick knack there, in usable shape and it better have good fenders and grille. A console and shifter (if CONSOLE 4 speed) would also be a definite plus.
Bumper jack still there?
Mark.