[ford38v8]

Mike, Of the two mounting bolts, the outside bolt may be the easiest to use for that purpose, as the inside bolt should already have a steady clip fastening it to the bottom rail of the block. Alternatively, just remove and clean up that clip for reinstallation, as it should also provide grounding. There should also be a ground cable from the passenger side head to the firewall. If you ever do want to go deeper, check the mounting surface of the starter for corrosion & paint, as that is the original grounding location. As to ease of installation, though, your idea would certainly be easiest. Remove only one of the two bolts for the grounding. One thing here... Count the turns when removing the bolt to ensure that it is long enough to accommodate the thickness of the cable when reinstalled.