First major milestone accomplished: The danged ol' seats are out and gone.
I listed them free on Craigslist. Having no takers all week, I loaded them up and took them to the dump. All 1,460 pounds of them (.73 tons by the scale at the dump).
With the seats gone, I was able to get some good measurements. 88" wide from inside chair rail to inside chair rail. 365" from the edge of the engine bay at the floor to end of the last window behind the driver. I'm figuring on finished floor space of 7x30 feet.
Previous costs $2560
October space rental $100
Costs of seat disposal $180
Total so far $2840