Hey guys im new on here. I have a motor here 350 bored .30 over. the motor is totally built up. lifters. cams. ect. perfect oil pressure runs very very strong. but all teh sudden it has a lfight knock coming from the passenger side. I don;t have a clue whats wrong? is it a roller rocker loose? you cant here it at idel at all only when you give it gas