Had to do a quick test fit to check proportions. I have made the top roll 51mm, 2", which is bigger than stock but think the same as when this style is used on Dodge and Chevy pickups. At the moment it looks too slab sided and the roll top heavy.
With the stock Willys rear guard in place it looks much better. The roll suddenly looks in proportion to the sides of the guards which is what I was hoping for.
By the time the stake pockets are made and fitted front and rear, and maybe in the middle as well like the stock Willys, it will take away the slab sided look even more. Also the skirts which step out from the bottom and go to the bottom level of the cab will improve it.