I remember a while back FRAM had some problems with their filters... That is why RapidRobert said non FRAM filter. I suspect the filter also..

You would have to drop the crank to get a mic on it, so plastigauge it, if clearances read good I would change the bearings because I'm there,but maybe not. Maybe just a high volume oil pump. Most don't like high volume oil pumps on this board because you can run your pan empty and they pull extra hp. I have done exactly that but that was a one mile race with 4.30 gears 7200 rpm for a long while.
I would button her up and run it with the for mentioned high volume oil pump and non FRAM filter. With your limited 5000 rpm and truck pan I would run it.. I have done this to a couple big blocks and one small blocks non of them expired due to bearing failure or lack of oiling.