Originally posted by GUNSHIPGUNNER
The engines lower end does not need any sort of running in as the precision with which engines are made these days precludes it.
This is a quote taken directly from the Jett Engineering site regarding running in...
"There are more ways than one, but it is important to remember one thing: With an ABC or AAC engine you don’t really have to worry about breaking in the piston and liner as that will take care of itself.The rod and crankshaft journal pin fit is the object of the break in."