Vehicle part suggestions

So I was building a quick and dirty wagon to haul some goods around, and it quickly became obvious that you cannot make any form of storage for a vehicle out of wood. This seems odd to me, and a wooden box might not be amiss.

With regards to batteries in vehicles: Rather than installing them directly, how difficult would it be to place a mounting bracket (welded/duct taped as normal) and allow the installation of batteries in that location via only a wrench-type tool?

Check the dirty hacks pack in the mods forum for the second part, they do exactly that (also for windshields, seats, seatbelts, stereo systems and maybe a few other things)