I've got one of the reproduction Rexaco oil pressure gauges on my 31 tudor. when the engine is first started when cold the needle will go to 10 lbs for a short time and settle back to 2 or 3 lbs. This is normal for a stock model A engine in good condition. I f the needle stays at the 10 lb. reading it would indicate a blockage and serious problems will soon follow.10 lbs would be way too much for a stock engine.