So turbo...I now agree with u. My cables weren't long enough to reach from trunk to block so I pulled battery out... and sat it beside car and hooked positive wire right where the one from the trunk was hooking up at and ground to a point right above starter....and bam....fired right up even with headlights on.
So my thinking is I'm gonna get 20ish feet of 4 gauge ground wire and run under car (protected that is) to battery and also leave my other ground I have back there on. Since power likes path of least resistance
