My buddy that used all my 440 parts when I converted to EFI just sold his 70 Charger. She was beautiful. 440/black with A/C he listed it for 67k and had seven full price offers on day one. Clearly he left some money on the table.
I might be high but figured someone could offer less. Funny you can always go lower but you can't go higher.
A nice done 440 car I think would be worth more than 67k but it's what your comfortable selling it for.