Big Block '67 Valiant k-member/firewall

You can bend over the body seam and then beat it flat with a big hammer. That's what I did. On the K-member, I believe you are talking about cutting the motor mounts off the K-member and relocating them. If that is what you're referring to, yes, it can be done. I've seen it done on the later style mounts, but never the biscuit mounts. Not that I don't think it could be done, I just haven't seen it done.