I don't believe the breaking is related to HP. I'm sure it increases the risk, but when you have stock or mostly stock trucks breaking cranks, it makes it difficult to point the finger at HP or Tq.
I agree, I see far more completely stock trucks come into the shop with broken cranks(lbz/lmm mainly) than higher powered trucks. 99.5% of the built motor guys or higher hp guys all broke just cruising down the road not while making a lot of hp.
I appreciate your responses and point taken. It would still be nice to know some percentages. How many engines produced, how many broken cranks. All the buzz around here is mostly built engines breaking them? The high HP used has to accelerate the problem