Found this in my oil pan

[PeteH]

Since the oil pan is off, you can disassemble one bearing cap at a time to look for trouble, start with #3 main to see what the thrust bearing looks like. You may not be able to pull #1 or the rear most main cap, but should be able to pull all the rod bearing caps. The condition of the bearings would be a good indication if it's time for a rebuild. If any part of those chunks were pumped thru the oil system, there may be scoring on the bearings and/or crank. Also, since the bottom is open, I would take a good careful look at the piston skirts with a flashlight, look for any chipped or broken edges, although being aluminum, those would not be magnetic at all.