The ground lug can attach to any piece of sheet metal around the inner fender, radiator support, etc. While you're at it, run some fair-sized ground wires from the frame to the engine, and frame/body, etc. It's hard to have too many ground wires. Run the negative battery cable to the engine for good starter and ignition grounding, and then ground the frame and the body metal back to the engine or the battery with smaller wires.
Jerry
