Recently I was helping out a friend at his shop. He had been building some 6.0L LQ4 engines and a couple of LS1's for customers. I noticed when I installed the cam on the 6.0 it was really hard to install and it wouldn't turn easily. You had to put the gear on and spin it with a wrench. I figured the cam bearings were the wrong size or the cam was bent. He says he's had that happen in the past quite frequently and he had a machine shop tell him that's common. IS IT REALLY? is there something wrong there???