Spending hours cutting, measuring and stitch welding (still not done). What is my reward? Sheet metal buckling. Slight but buckling anyway. I'm used to replacing floors in first generation Broncos that have the metal rib stamping for support. For the Willys it is flat sheet metal prone to do what it did...arg...
I'm probably over complaining but I like my sheet metal straight, like my women.
Looking back, I probably didn't move around the perimeter enough with each weld.
When I do the other side I will spot weld a few areas on the newly installed supports under the floor and see if it helps. Then, proceed to stitch weld.