Hi Neill,
The filter was full of crap, but the pan wasn't any where near as bad. Most of the stuff got sucked up and caught in the filter, not enough to impede flow I think when first started and the oil pressure is around 80 some gets by the bypass. I had some very small debris in the bearings. The bearings did their job and captured the debris and wore down rather than the journals wearing.
I just noticed, as I was clearing things off the bench making room to strip the heads, one of the PRW stainless roller rockers had made contact with the poly lock. I took two of the rockers apart and found the trunnions worn on both. The trunnion metal is so soft there is needle imprints in the truninion steel. They made the rocker bodies stainless but used soft steel for the pivot trunnions. Gets stupider every minute. That may be where the fine bits came from that failed the bearings. Cliff Ruggles tells me he had a set of the PRW rockers and they filled his engine with metal as well.
If I had a bone stock engine I'd heave all this after market junk off the dock into the chuck.