Hemi Road Runner takes 3 feet of salt water on Long Island

I feel is not "ruin" just needs a very good cleaning-the sooner the better. Salt washes away. I would remove the seats and carpet and wash it inside and out, flush the engine bay and trunk out as well. Towel dry it and take it from there.
this.

It's salt water, not sulfuric acid. It's not like the car is going to dissolve all of a sudden lol.