diggin dirt Posted February 19, 2011 Share Posted February 19, 2011 i've got 1978 endt 676 and a 1981 em6 285 and they look identical, i know one is rated HP (283) and the other is cubic inches but why did Mack change their naming. are the heads interchangable. my new head gaskets have a notch cut out in a bolt hole right next to the cumbustion chamber. it just dont look right, does anybody know what i'm talking about? Quote Link to comment Share on other sites More sharing options...
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