Agree with Stan.
Patch the fender yourself and leave the door. It's a tow truck! Worry about mechanicals. Nothing in your pics is major. You are going to get upside down with this truck. It is a single use, not many buyers truck. Not a daily driver. Expensive tires and hard to find parts. It is rare and nice to look at. Maybe somewhat useful on a ranch or farm. 1000's for body work is not good money management in this case. Your truck, my opinion. Trying to be honest with respect.
So what is the serial number???????????????????????? Also on 62 and newer 409 passenger car motors, there is an "X" cast into front of block. Driver side. Upper left of driver side water pump hole. As my Vietnamese friend used to say "what the heck going on?"
SORRY. I Can't get to the serial area. It's under the air compressor. I'll try and pull it off tomorrow afternoon and see. But it appears to be a standard height deck based off what I heard about the water pump bolts.