I think the old ford truck frames were made of kryptonite. I have had a lot of them and no matter how bad the body is, the frames just need a light cleaning to paint. My buddy was really proud of his old d***** powerwagon, but he gave up on it and sold it for parts when he found the frame rotted almost in half between the cab and box. (I 'prolly' would have scabbed some long fish plates on it and called it good, but that's just me). Now he's looking for a ford. Anyhow looks like you're on the right track. I'm with Spur about fixin' em to drive, and most of us here like a GOOD fix, not just laying the good over the bad. Don't forget what Neil Young told us long ago..... "Rust never Sleeps".