This light and warning horn fault of coming on around 2200 rpm is still
plaguing me. I have spoken with a most highly reputable shop and was
advised this is problematic only in the sense that the dynamic system is
not working properly, gives erroneous information, and causes near heart
attacks.

It COULD indicate loss of oil and pressure, but most often not. It's mainly
a big annoyance, but one you definitely want to check out. The oil pressure
switches are readily available, but the circuit board that goes in the dash
pod is not. It seems to be NLA. This raises a problem on how to deal with
this.

GoWesty makes blue ribbon replacement kit, and it addresses this issue, but
it's pricey. The other option and the one suggested, and also used by the
shop, was to install an oil pressure and temperature guage.

The one thing I still am not sure about, was the recomendation to remove
the wire from the high pressure switch by the water pump pully, and groung
it to the block or frame.

Any ideas about that?

John