Not all schoolbus seats are bolted to the wall. My Burb was used as a rural school bus and had bus seats still in it when I got it. They had 4 regular legs with round feet. They looked so close to the Burb seats I thought I had the original three rows of seating, but later found out about the floor mounts. I do agree with the measurements Weeds gave (the seats looked too tall in my opinion). If I can dig up some old pics I will.
As far as the Jeep rear, you would have to build a frame for it it sits right on the tub. I own a Jeep and can get measurements if someone wants to go this route.