I have a 1948 1 ton and am in the process of switching to 12 volts can any one recomend a 12 volt battery that will fit under the floor like the original 6 volt without shorting against the cover,my local NAPA came up with one but it was a little to tall and to close to the battery cover it may have just been the person helping me it seems like NAPA should have one that fits well any suggestions Thanks