race car only? get it to idle and transition off idle cleanly, drive around pits @2k and tune for WOT around 12.8 afr. Put 12" extensions on the headers to get a better sensor read. Get the plugs front to rear as close as you can get. Unleaded pump gas leaves virtually no color even @12.8 Once your in the 12.8 ball park jet up or down for best mph and you are done.
