The floor is dropped 3" to recess the 16 gallon tank. 65 sunbeam, the wheels are stock Ford 14" x 5" for a Fox Body Mustang, T-Bird, and several others. I got mine on-line for $41.00 each. They are refurbished to look new with trueness checked, welds inspected, and painted. They looked new when I got them and they were shipped in boxes. The spare tire wheel is one I got at a wrecking yard for about $15.00 and cleaned it up and painted it. It looks square (true) but I did not do a real trueness check...its a spare. Checking for runout, dings, squareness of the mounting face to the rim, and out-of-round shape seems worth the extra expense...especially since I was looking at $100.00 plus wheels I was not sure would stay under the fenders. These work fine. The backspace is just over 4" with 4 lugs on 4.25" hole spacing and the center hole clears the front hub. Looking at tire size and shape, 185 x 70 -14 will work.