Where does the ground cable from the battery connect? I second the suggestion to use heavier cables- - - -I make my own from #0 gauge welding cable. Make the battery ground cable long enough to connect to the engine block or one of the bell housing bolts- - - -not to the body or frame.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!