[dzbowtie]

When it first fired up, I’d say idle - 1200ish rpm. I initially filled the radiator prior to start up and it was pulled into the engine. I verified my sending unit, it is compatible with the same brand gauge so I’m sure it was reading correctly. I’m guessing it read the head temp without coolant making it up there at that point. The heater hose has been hooked up to the water pump and intake, prior to starting. The timing has not been set yet as I shut the engine off once I read the gauge. I was thinking the cooling system needed to purge the air out.