I think my engine became continuosly louder over the past year and a half. Not from my exhaust, but my engine it self. Im guessing the lifters are starting to get old ( or maybe they were from my old motor and didnt do too well in the swap) or maybe my rockers are starting to loosen up. Any other ideas? What is the correct way install aftermarket rocker arms? (The are scorpian brand on twisted wedge heads)