Forgot: neg to frame ground at rear, don't rely on engine to firewall ground, it will fry(don't ask, lol).Install big cable from block to kframe. If not a one wire, you need a 4 post switch in the rear, to kill the alt (will keep running if not- huge frowns from track staff). And bypass that ammeter, instal a voltmeter.. Get that crap out of the dash. It will bite you before you know it. ( been bit twice, and know people that been bit).