Looks like you'll be able to break it all loose. Reminds of my 1955.1 bed project years ago. Metal bed strips look like they can be reused, if desired. I used new zinc-plated carriage bolt hardware, rip-sawed and grooved the treated 1" southern yellow pine planks to three different widths, cut plank lengths to fit, bolted it all down and painted the bed floor truck body color. You're off to a good start.
