[wprater]

Thanks for looking into this and verifying the temps over various operating conditions and being so thorough.

I will do similar tests when I get the car back down from the lift to fix a few other things.

Using an IR heat gun to verify temps at exits from auxiliary thermostat. I won't rely on the VDO gauge.

The plumbing to the thermostat is routed correctly. I'm not sure if the plumbing to the cooler will make a difference.

The sizes/cooler I got from the PO, but I did not verify the receipt. I can try to count the rows in the matrix to get a better assessment.

My engine is a 3.2 SS with very high compression and running PMO 46 carbs.