So, i made a new center crossmember to help support the new flooring, and body. I am doing the flooring in sections for ease of install. but the rear seemed a bit flimsy. so i rolled some 1/4" beads in it.
I also am raising the drivetrain so i can have a flat belly. But looks like i was a bit off on how high i made that center hump. I am going to cut it gown tomorrow to match the rear of the tub.