FWIW some of the power stroke diesels use PM rods. They seem to hold up well but they can be broken when power adders are used.
What puzzles me is that Ford made a truck that was designed to be a hi-performance vehicle. The majority of people who buy a vehicle like that are going to enhance it at least a little. I think the engineers should have realized this and compensated accordingly. Maybe they did and people enhanced things more than the engineers predicted.