Is it safe to remove the body of a GM A body with the floor pans cut out? It is a 1964 cutl*** 2 door post car by the way
I don't think it's safe to pull any body off the frame with the floor pans cut out. The body is effectively a big box. How sturdy is that box once you cut the bottom out of it? Especially since the top is only held on with the A, (sometimes) B, and C pillars.
Either put the new floors in it, or put in some cross braces, otherwise the body will fold toward the center. You need a good trunk floor too. Gene