Gawsh, mmmm both 383 cars originaly. Paint is better on the plum crazy and it's a GC, and it was originaly a sub-lime car. 440 with a 4-speed can't beat that.
If it checks out for the money, I'd rather get the Plum crazy GC. Black one looks like a beater from here.
I'd drive it like it is for awhile, and then I'd pull the engine clean up the engine compartment, get some original tins and paint it all Hemi orange. Check out the cluch, see how the 4-speed is, and slide it back into place. New carpets, maybe seats at some point. Buff out the pin stripping and slap on a 440 hockey stripe.
I'd also get a new exhaust with Cuda valance and rocker moldings, and suspension rally wheels and tires.
It'd be a nice rolling project.