The cage is in. These photos were taken while at the fab shop. It is now finished with solid door bars.
Fortunately, it wasn't to hard to make the cage work for both my Targa Newfoundland tech and my ECTA Land Speed Racing tech. I was going to do fancier door bars. But the opening is small enough that a diagonal bar is best. It also leave expansion room should I need to "x" it in the future.
Went out to test fit seats. Everything barely fits. Make sure you measure race seats, I did and it's still tight. Of course you may not need to incorporate a child's seat seat. But most race seats are around 21-24" wide, they are bigger than you think. These trucks are 65" door to door. Add a Roll Cage. Some room to move and boom - no space in the middle.
Have had to work with tech, like a lot. With the truck being heavier, they wanted larger bar and gussets. However, once they saw these photos and the fitment and quality of the welds, they said the extra bars, gussets (and weight) was not needed. The Corbeau Seats are my street seats. We are making mounts for swapping out the Momo Containments seats for track days.
The floor is padded with 6"x6" steel plate sandwich both top and bottom. It's bolted together so I can pull the body off when I do new chassis for Phase 2. The pads on the bottom are tied directly to the frame.
My little guy seems to like the new jungle gym. Overall, very happy. The guys have build it so it can be added too as I further the build. Eventually, it will reach into the engine bay and I'll put a couple extra bars in the bed for rigidity.