Thanks! Any suggestions on what rod material to use?

I'm on a project that is ballooning in complexity. I believe that I will need to add material and then remachine. Will post pics when I'm done.

Need to practice. My tig welding skills are rusty................

67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......