Been driving this car, realizing that ignoring the problem is stupid. In doing so, I'm realizing that there really is a problem.

Oil is nice and full, running 20w50, if I remember right. When normal, it runs at about 40 psi, drops to 18 or so at idle. But after driving to full warm up, it drops to 10 or less, and no more than 38 while driving. The PSI indicator light actually came on at idle today.

I put this engine in last year because my last one lost oil pressure in same way, died.... one week after having put two years of work into it. I could see nothing wrong with the oil pump. But this engine pulls oil up into the rocker shaft area very well, so...

I'm going to pull the pan and check the screen. Nothing there, I will pull the pump. What else should I look for?