[escavader]

PAUL,
SORRY ive been away this week.Looking at your pics,your floorboard looks the same as the 23 ,except we dont have that plastic thing under the battery box.If you could remove that,id bet your metal floorboard under it comes out as ours does.If not Mabey you could design a freshair vent to feed in the battery compartment [after you plug the screen up to keep your air in your cab]so that the radiator has fresh air.In my opinion id go with one of these options before i started messing with fans.
Get some tools and take that battery compartment apart and see what you got .Cant tell by the pic what that plastic thing is,if all it does is hold up the battery box,a redesigned box is easy.
ALAN