My 1972 f100 tub is in for repair i stopped by the shop to check on the sandblasting.
The front channel / crossmember / sill is in pretty rough shape, what do people typically do in this situation?

i found this on another site, i assume the rectangle part could be used a replacement that would get away with not doing crush tubes etc?

Also most of the floor has been cutout, the body shop guy wants to put diamond plate over the whole floor, i'm in Australia and have very little access to panels or replacement sections. What do others do in this situation?
Thanks all.