I think it was @crackedback that made the suggestion that I followed. I welded a nut to the frame in the rear below the battery. Then I ran the ground cable to it through the trunk floor and bolted it up. Very short ground cable needed!
I also welded a nut on the inner front frame rail that I ran a ground cable from the RH rear cyl head hole to this welded nut. Simple enough! IMHO, you cannot have too many grounds!
