Yeah, I think that is just overkill. I have never heard of any diesel engine having problems with the connecting rods. Personally, I think Cummins was just to cheap to make another whole set of connecting rods, so they just used the ones from an engine they already made and made em fit the smaller engine. Cutting corners........ Off the subject, but I saw an old F-350 yesterday in Louisianna that had a specially modified 5.9 Cummins in it. He said it was a 12 valve. It was pretty sweet! Now, I am just going on what this feller said, there might not even be a 5.9 with 12 valves, I dont know. Is there?