The area under the final drive has been redone. The curved part of the hull is about 3mm thick and the only way for John to remove the dents was to cut it out, work the panel on an anvil and then zap it back in. He also fixed a hole cut through the hull for the Holden motor exhaust pipe, and a few other holes too.
He's added a common modification that Weasel restorers do - a drain plug in the hull to allow the final drive to be emptied without turning the inside of the vehicle into an oily swimming pool