engine noise

Slim, Did you run a brush thru the #5 main oil galley? Did you measure the crank's main journal for taper? It should have less than .0003... with none being the best. This will not be shown on plastigage, and it's enough to hurt the oil wedge. Also, if you have a full groove set, you are very possibly making it worse. More oil goes to the rods with a full or 3/4 groove set, thus starving the main surface itself more.