Next vehicle is most likely gonna be an '01 - '03 pathfinder with the 3.5L engine. Had a setup in my 97 but the metal used on the vehicle was relatively thin and rattled a LOT. Just wondering if this is the same for the early 2000 pathy's. Anything I should know regarding difficulties with the big 3, getting past the firewall, etc. Is there space under the rear seats to put any sort of amps?