[RC-Monster Mike]

First, you would need a 14s ESC and a 14s motor capable of powering the truck. A pair of 7s packs(Hyperion, for example) will fit the battery tray, though you would need longer straps. I don't see how you would need more wiring or wiring difficulty - the motor and esc and batteries are all near each other on the chassis and a pair of 7s packs wires up the same as a pair of 4s packs. The theoretical 14s setup will create the same challenge on any configuration not designed for your specific(theoretical) setup - nothing is really "one size fits all", but we try for "one size fits most". :)