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Can you check for oil pressure with the head off or does it need to go back on? I have an oil pressure gauge that I put the stock hole with an adapter but can switch it back to the stock sensor.
You got it! Glad we could help.
I would double check your oil pressure switch wiring as I mentioned. I blew an engine having mine disconnected and running low on oil. The switch simply closes the circuit to ground when the oil pressure is below (7-10?) psi. The wiring commonly shorts to ground and sometimes a previous owner takes the bulb out of the cluster. I would confirm that the lamp is operating normally.
I would put a new headgasket, new bolts, and new hushers. Get a set of feeler gauges and a micrometer to setup the valve lash.
Take a look at your remote cooler setup - there may be a plug in it which could be removed to add a pressure gauge or switch on the return side. You'll need to check the thread size.
I originally had the gauge sender plug into the remote setup and it worked. I wanted to set it up on in the stock location so I moved it. I am going to put it back. So that I have both the dummy light and the gauge.
How long should the head gasket last? I just changed it when I swapped the head over and maybe had the engine running for 30 minutes total while checking things over.