I believe I stumbled upon a '68 or '69 Belvedere...

You won't know how bad it is until you drag it out. As I said regardless of what you do, there is more than $200 worth of parts there. Are there clutch pedals? If so, that's probably $200 right there.......but I doubt it is a builder. As said there have been worse resurrected, talent and money are the only things between here and there!