If the 28/29 year cab then yours is the Model T derivative doors. You can tell the doors at a glance by a look at the backside: look for the trapezoid hole and the three bolt landing spot for the window crank.
There are a whole bunch of pix of the 28-29 square cab at
https://www.jalopyjournal.com/forum/...-body.1018752/
This one a nicely restored example - but IIRC, the floor goes under the seat and to the back of the cab, is riveted in place, and is placed before the seat riser. Some of the rivets go through both. I can see "dog ears" in the corners where he ripped out the floor.
Joe K