Please excuse the excruciatingly disgusting state of the shell but this is the way I got it. This is the essence of what Crayford did:
The inner sill is reinforced with a box section of 1/8" plate welded and bolted in place which in turn is welded and gusseted into a vertical reinforcement up the A post and tied into the dash pan. The sill reinforcements are bolted into the rear companion bin inside which is another piece of reinforcing welded onto the upright part of the inner sill. Across the rear seat pan is another 1/8" plate boxing in the area under the seat. On the other side of those bolts is a small channel section to spread the load throughout the floorpan and inner wing.
It's difficult to see those parts in this photo but that's what I have at the moment. I have to dig out the bits to make drawings so they can be remade. I'll post some better photographs and dimension drawings on the weekend. Stay tuned...
