Echo what Woody said. Remove it, fix it, box it, and cataloge it. Whatever way you organize them, it will pay dividends when you can grab what you need of the shelf and install it on the truck as you put it back together.
The last resto I did (79 Jeep CJ7) I couldn't tear the thing apart fast enough to get to work on the tub and frame. Then spent forever refinishing/reworking each component that came off. I've decided to do the 49 differently. Each component I take off, I R&R and box. Then when it comes to reassembly, it is just a matter of bolting parts on. Thats the plan anyway.
And never never never never never throw anything away. Even after you are done. You will need it later.
