Noticed my SRT-10 has two battery boxes, both driver and passenger side. The driver side is occupied, passenger empty. I heard thet the SRT-10 is actually built on the 2500(3/4 ton) frame, which is available with the diesel, and two batteries. Any solid info re 1500 vs.2500 frame under truck would be appreciated. Am thinking of fitting empty tray with strap for heated lunchbox.