So, I went to my local sheet metal store, and bought a sheet of 18 ga 4' x 10' cold rolled sheet steel. Using my patterns, I replicated them on my sheet metal and cut them out, being inspired by a thread by @Da Tinman I used a couple of pieces of angle iron, and beat into submission my patterns, then ***embled the pieces. If this were in area that I wasn't covering with insulation, I'd probably have broke down and bought a decent sheet metal brake....but this isn't something I intend to do any more of...well, there is the floor. [/ATTACH]
CAD is our friend. For those who haven't used it: cardboard aided design. I had a 40 years ago so I fully understand what you're up against. A man who has done 9 trucks knows more than me.
I wouldn't go that far. Joatmon might be more appropriate J jack O of A all T trades M master O of N none