I'm in. The swap is nothing but work and effort. I do nothing but repair rust. Is it "worth"it to do a roof? That's another story. Does the sunroof hurt, no, it doesn't matter. You don't have the drive train. Rust repair is just a bunch of spot welds.........unless you open up the can and the inside is rotten. I'm going out on a limb here, but I would be very leery of this car. In my world, and that's a rusty area, that roof would make that a $500 car. ONLY because it is a 340 4 speed.
Slant 6 or 318........parts car.
There is another view for you.
Sorry