it's a cool car...I love U-code Challengers.
But, I just don't see $50k
If you just take care of a few things and enjoy it, that would be fun.

A restoration is going to open a can of worms with as much as the car has been tweaked and modified over the years.
Vinyl top and window added.
Spoiler and hood added.
Repaints...

just my 2 cents