Like posted above go for 2/0 welding cable, will save you some money. Upgrade your batteries to AGM if you haven't already. Install a volt meter to monitor trucks voltage and one to monitor amps voltage.
I would personally upgrade to 2/0 or at least another run of the 0 gauge. I would also add some extra grounds. It's crazy how insufficient factory grounds are, but they are penny pinchers so never spend more than they have to.