My 1974 Pantera came with the no hole plate along with a Windsor thermostat. It was the first Pantera for me with this setup. I left it in place and all is well. The car runs cool. The downside to this setup is the engine is supposed to take longer to warm up. Strangely, I have not found that to be the case. The car warms up just like other Panteras. I'm in southern California and maybe it is different in a colder climate.
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