In my opinion the conversionkists suck . completely on the basis that the cams have a reduced base cirle and that not only compomises strenght of the cam(no a big problem) but it limits your total lift and duration #s if you want roller lifters go and spend the big bucks and get a set of linked roller lifters and a matching cam they offer the best performance gains b/c they allow the use of a standard base circle cam, in they end the linked lifters cost a bit more prolly 2-300 over the conversion kit but for max gains its the way to go anywho thas my 2 cents
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