I went with steel. I also went with 2 piece because it was impossible to install a one piece with my subframe connectors. I'm using the stock whatever-its-called junction under the driver door that came with some cars as I had one. It looks challenging trying to get a one piece snaked everywhere you need to.
69 RS Conv therapy program, Autogear M22, 8-pt cage, with a new 410! SOLD
New therapy program - 68 Coupe. Will be survivor exterior, modern underpinnings! SOLD
67 Belair with perfect floors, pinchwelds and firewall. Hmmm!