I found a lot of metal grit in the bottom of the pan. I found the source to be the timing chain grinding up against the block behind the cam gear. It gound about an 1/8 of metal off the block. All that metal grinding grit worked it's way through the motor, almost seized the oil pump, destroyed the lifters, made a total mess of the crank. I'm not sure why the timing chain was able to hit the block. It's a double roller gear and chain, I double checked it and it is the correct part for a 351W. Anyone ever see this type of problem before?