Got the seats out and to the dump yesterday and today. Originally we unbolted the aisle stanchions but my wife was having difficulty lining up the socket on the impact gun os I cut the remaining stanchions and unbolted the outer mounts. As soon as it stops raining I will go back under and we'll unbolt the rest of the mounting plates. Checked the floor over and under for any rust or softness in the usual suspect areas and it is sound. The heavy undercoating underneath is unbroken. Hitting the wheel wells with a hammer showed no softness. I am going to leave the original floor alone and go over it with my final finish flooring.
Any estimates as to how much coolant I will lose when I disconnect the bus heaters. I only want to leave the dash heater operational. Looks like two bus heaters will be going bye-bye (and the associated hoses).
I left one seat in place (right front) for temporary passenger use till I do finish flooring.
And now some photos;
Seatified
De-Seatified
Seats going to the dump. It took two loads and cost $80 total.