You are right in what you say. I remember talking to my machinist, years ago about rods. He said SBM rods were good to 7,000 rpm and could be used in blown applications. They are not weak kneed SBC rods. Just thinking of application. It all depends on cost and the whole picture. How much does your machine work cost, and do you trust them to do the work correctly. I am not faulting your logic.
