66Submarine wins, I never seen anything like some of that stuff. My truck was in pretty good shape, only had the wrong motor mounts (I think they were the original V6 mounts so they added some 1/4" steel plate, drilled some new holes and viola custom fit mounts for a small block V8. All it needed then was a couple of pieces of chain and the engine was in solid.
They put a 4' x 8' 1/4" steel plate to cover the small hole in the wood floor. Only weighs an additional 400 pounds over stock. There's a toggle switch and a push button on the dash. I have no idea what they were for, maybe the horn and backup lights. The wiring was pretty decent except for 50 years of neglect. I only had to replace the wiring from the cab back. One of the starter bolts was broken off in the block somehow. That's about it aside from all the puke burns on the driver's door, inside and out. Oh yeah, I had to make a new harness for the turn/parking lights in the hood.