You can keep the drivetrain and EVERYTHING you might want or need off that truck, part out what's left and still make a good profit. I'd bet you can keep that stuff and get at least $1600 out of what's left.
Not sure how different the 59 would be from a 61, but I'd say about 3700 pounds without a driver for a 2 door sedan (wasn't that what you have?) with a small block.
Does anyone have a real world weight of a 1959 with a full interior and a SBC?
I'm guessing it should be around 4000 or under.