Main bearing question

Krooser said

Cam bearing seldom wear very much... Doing a in frame overhaul without pulling the engine was the way it was done for 80 years... Still is with class 8 trucks. We used to bore a cylinder in a straight six and grind a rod journal while the engine was in the car...

Click to expand...

that's the second time I've heard that. A guy I used to know told me similar stories. He said, they had a machine that clamped on to the journal, and they would roll the crank around a certain number of times, and it would take off so many thousandths of material. I didn't know if he was BS'g me or not. He could spin some yarns, that much I knew.