Well, I was all ready to ut a US Spec engine in my car out of fear that the timing chain had broken, and I find out that it is in one peice, is a double row chain, and that there are little peices of broken plastic (very old looking, and brittle) strewn throughout the area beneath the valve cover. I cannot seem to finish the jigsaw puzzle, so I can only assume the worst (though much better than a new timing chain and valves, etc.), that I will have to take the engine apart to fish out the remaining peices of plastic. I am assuming that these peices are part of a broken slide rail. Is there anything else that they might be? Also, does anyone have an estimate as to how much new slide rail installation should cost?