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Message: <blockquote data-quote="MeanGrn Gt" data-source="post: 15911" data-attributes="member: 8422"><p>Actually i believe with the twisted wedge heads you will be alright, afr 165's will be fine too but afr 185's need to be notched. It also depends on the cam (not peak lift it is more to do with duration), rockers etc. Some people say that you should always check it no matter what because every engine is different and the tolerances are tight when it comes to piston to valve clearance . I have done a fair amount of reading about it today as i am trying to decide which way to go with my car :dunno: Maybe ill just stroke it and get new pistons too :naughty:</p></blockquote><p></p>