For those of you looking in here's a photo with dimensions of the right seat base:
There is a bit of room to relocate the seat itself.
The body floor itself---disregard the plywood edge towards the rear---that's in my cargo-only van:
As for the doghouse swap--if that's doable it might not address the width of the foot well space. I believe from '92 onward the bodies and floors would be almost identical---I could be wrong there though but if so that might not be a cure.
I swear if your feet can touch the floor you're just not going to be comfortable in that right seat!