My 01 LS V8 w/ 54,000 had a distict miss, then CEL came on, steady. This began Monday evening, Went to Autozone, code said P 0301 Cyl 1 missfire. Bought the NEW valve cover gskt w/ the seals today, 4 plug boots just in case (all of my 5.4 tritons have burned through the boots @ 70K plus...