What do you think caused the con rod to break in the old engine?
I think it was a combination of worn out engine and too much skinny pedal. It first started to knock after I attempted to get out of some mud (Well you gotta clean the tires!). It got worse as I had to drive 4 hours to get home. I just about made it there when she let loose.
So, I suspect the initial damage was caused by high revs and excessive clearance between the bearing and the crank shaft. Therefore causing inadequate lubrication, or film, if you will between the two surfaces. The engine did have a lot of miles on it.
Just a guess...