of any missing grounds. It is simply a matter of using 8 ga stranded copper wire and some connectors and starting from the neg battery post running leads to several parts on the engine and the body. You can use a single series lead and go to several selected points on engine and body or 2 series leads from the neg batt post to each side of the engine and the body (I did it this way).
Here is a write up that uses 3 leads from the neg batt but I think 2 leads is more than adequate as long as good points on the engine and body are selected.