Perhaps around year 2000 or so, list vendors had a sale on newer
instrument clusters.  I bought one, installed it in my '84 and made the
wiring changes needed, particularly the one to keep the oil pressure
buzzer from sounding when engine exceeded 2000 RPM.

This fix worked until recently when the so-called grounding wire that
kills the oil pressure buzzer apparently came loose from the connection
at the foil.  Being that I am somewhat older and that future van driver
has been occupied with school work (two AP classes) and leader of the
electrical group for the school's robotics team (rookie team on the year
at Peachtree competition) and made it through the international First
Robotics competition in St. Louis without making mistakes, just not fast
enough), the van has not been used.

So, is there an easy way to do the grounding without having to take the
instrument cluster out or work upside down underneath the dash?

John