Brian has set the cams in place on the heads. Remember, the cams are intake and exhaust specific. In other words, you can’t just take the cams and throw them on. You must make sure they are installed in their proper locations. The intake cam is on the inside, or top, and the exhaust cam is on the outside, or bottom. Before installing the cams, though, Brian makes sure to clean them of any debris. You don’t want anything on the cams when you install them. Any piece of debris can wipe out a cam so make sure to properly clean them before installing.