I have already checked ground/power. Gauges get power, just no data. As I said, everything works except for the lights and the data from the port engine.
Sounds like stats are not seated correctly. Only reading you should be concerned about is at the stat housing as block will be cooler..
Detroits are VERY comfortable at 2156. With properly functioning cooling and lube systems and a clean hull, they will do WOT all day, everyday. 1800
Your thermostat may also be stuck open and the engine is not getting up to operating temperature...and/or your spark plugs may also be carboned up and
that's what it acts like I will check the switch tomorrow and let you know. THANKS bigjohn