bccat and engines

This is so we don't keep messing up Truck Shop's Cummins thread. I'd like to hear more details about this you posted. Should be interesting. "We did the same thing on the big Alco V12’s, On the V16’s, we used a scope and mandrel’s with crosshairs fitted in the main bores, pain in the ass to set up, but never had a main failure or rod failure in the 30 years I worked on them. The Cat 3516’s we had were a different story"