Bought a rebuilt 4.1 from a board member and decided to open it and take a look. I found these metal chunks mostly concentrated around #2 main cap and under the 2 front pistons. Was told the engine just had the cam broke in (flat tappet) and then is was pulled. That looks corrrect as the pistons look new and the bores look freshly machined. The pieces look, feel, and are ferrous like iron. I looked around and could not see the origin of the debris. Anybody ever see anything like this?