After finishing the left and right side paneling, I decided that roof should be the next project. My wife decided that a skylight this big was just going to leak.
The new roof is rolled .060 aluminum. It is sold by the foot. This is a 35 ft roll.
We used the forklift to lift it up to the roof. Centered it up at the front and let it fly. Wish I had a video, It was cool to watch. I then welded up a quick "attachment point" to the fork lift and clamped the rear of the roof to it to "stretch it" This will keep it from billowing as you go down the rood.
Once stretched. We used new J molding and buck rivets to fasten it to the top rail. We used butyl tape between the roof and the top rail. We used grey Manus to seal the J molding. This should be a lifetime roof.
The walls of the truck body are actually held together by the roof. Without it they are very flimsy and sway back and forth. The body is much stronger now.