supra_devil beat me to it, but welding cable is probably the best ground.
id suggest running it outside your vehicle, in an armored conduit, well sealed as well...
ground the battery in the trunk, as well as running another ground to the engine compartment is a good idea, as it will keep your engine happy, as well as providing a backup ground, should worst come to worst.
id suggest running it outside your vehicle, in an armored conduit, well sealed as well...
ground the battery in the trunk, as well as running another ground to the engine compartment is a good idea, as it will keep your engine happy, as well as providing a backup ground, should worst come to worst.
