the factory grounding for the TF series uses a cable from the battery ground to a threaded hole on the firewall right behind the battery - there's another raised threaded hole on the pass side toeboard
just above the starter for a cable [originally the flat braided style] from there to a starter mount bolt, these 2 cables insure everything [including the body] is well grounded, no additional ground should be needed, the alt will have a good ground to the engine thru it's mounting
Bill
