not gonna debate anyone on this car. as far as I'm concerned, everyone is here is right, based on their own experiences and skills with such things
so speaking only for myself, and knowing the bacteria/toxic content of MOST floodwater, you can never re-use anything in this car that ABSORBED that water (upholstery, headliner, carpet, etc.) ever again.
even if a "clean" flood water (like a pipe burst in garage), unless you RE-soak the soft parts in the strongest disinfectants/cleaners known, and they survive that "resoak" process, you're bound to get toxic molds (they are resilient fungi) somewhere later.
IF it could be cleaned up, my experience is the cost of that outweighs the benefit .. objectively looking at it (unless it were a HEMI Cuda or something high dollar when restored) for THIS car as was noted.
But, if it belonged to a deceased loved one, for example, maybe the economics don't matter. So in that case i replace ALL the "soft" parts, as others have pointed out, and check the "hard" parts for damage/retained water (not a trivial task for the electronics but "doable" with selected replacements of such parts)
guess we'll never know for sure, on THIS particular car, unless one of you gets THIS car and tries to rehab it and drive it for a while. I'd wish ya "Godspeed" on that task.