Did the particles appear to be fresh metal? Possibly some left over milling particles from the head work would be my guess. At least I really hope so. You might want to consider an extra cheap oil change after another couple hundred miles just to be sure that all particulate matter has worked through the system.
Also, did you by chance run a magnet around the botton of your drain pan to see if any particles were still in suspension and not trapped by the drain plug magnet?
73 280 SEL 4.5
[This message has been edited by MikeTangas (edited 10-31-2000).]