2019 summer race.... Jadaharabi vs 318willrun

Wow, that is crazy. I have a trunk floor pan to do on my sport. At what point do you have to start "bracing" , to keep everything square and level ?
we have to take the trunk and the rear off as well I think the only thing that's going to get saved is the driver side quarter and the inner skin of the back deck...
not much worry about keeping it Square I don't think it was very Square from the factory LOL... We're talking 1965 they weren't building BMWs tolerances...