After tearing down the motor, the new cam was slipped into place with plenty of assembly lube. We asked Jeff what is the benefit of having a 4/7 swap ground into the cam. He said, "On the Chevy motors, the number 4 cam bearing has extra load put on it because the number 5 and 7 valves are open at the same time. Also since 5 and 7 intake ports are next to each other, when the number 5 cylinder valve opens it disrupts number 7's intake charge. The swap cures these issues and makes the motor a bit more efficient."