it looks way closer than 4" to me. could be the picBattery pos is on the bottom and the brace is bolted to the floor and 4 inches away from the distro block that is attached to the side panel. You can push on the bracket and rock the van without it moveing.
I get 14.3x at my rear battery also //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gifnoice. i get like 13.4v at the rear battery with a g31, a g34 and 200a alt (at idle) //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif