It's a complete car... sell it and let someone else restore it. I wouldn't rob parts off it because what you need is out there. You just haven't found the right source.

FYI. There are a lot of '66-'67 B-bodies in Texas boneyards.

I wouldn't mind having it but don't need anymore cars.
You could always get it running and drive it as a survivor. Recover the seats first.
'66 383 B-bodies were the roadrunners of their day