Tie it together very good. Third gens twist pretty easy. You can put a big block 427 in it, but it's going to be a real pain. A 427 small block, or even a LS engine would be my choice. Easier to put in, easier to work around, and lighter. Just a thought. Is it a T-top car? If it is you might want to go full frame.
1969 x-77 Z/28 orange/ white stripes, named by my daughter "Clementine ", M-22 close ratio, 4:10 12 bolt, CE 302. Hugger orange with white stripes. White standard interior. Restoration complete May 2018