On out 1954 1/2 ton, the previous owner had moved the battery to the firewall next to the heater hoses. We are considering moving it back under the floor for a couple of reasons: 1 - makes the engine compartment look neater. 2 - modern batteries do not require nearly as much attention as the old ones. They basically are "maintenance free". If they act up, you take it back to the store and get a new one. Some come with pretty good warranties, so depending on how old it is, you might get a good discount on a new one. So my opionion is put it under the floor and forget about it.
