nows the time to think about getting that stock rocker arm set up off... its a pos and going studs .that too bad about the oil rings hasting is abit better to work PC are crap with the hastings they do not over lap as EZ .the new engines have gone to a thinner oil ring and are very easy to over lap or bend .i just did a mark 6 bbc were the guy bent the oil ring when he put it together it happens