I'm trying to have everything figured out before I start my narrowing project, but I don't know where to put my batteries. If you took your battery out of the engine compartment...where did you put it? I've been looking at trays from CUCV's but it looks like I'd have to totally remove my heater and it get COLD here. I'd kinda like to put 'em behind the driver or passenger seat but that's a long cable run. Should I just mount 'em in the interior and invest in welding or amp power cables or is there a good way to keep a battery or two in the engine compartment?