autoxR Posted June 26, 2008 Share Posted June 26, 2008 OK I did a search and read as much as I can, but all the different heads and combos used is making my head spin. So heres my question, are all 280z engines the same from 1975- mid 1977 so long as they have N42 heads? Quote Link to comment Share on other sites More sharing options...
Daeron Posted June 27, 2008 Share Posted June 27, 2008 N42 heads are all the same, yes. Same valve guides, same valves, possibly cam differences is all I can think of, and I can't answer that off the top of my head. The heads themselves are the same, though... there is no mystery like "early E88 versus later E88" or "P90a with solid lifters" or anything like that. All dquare exhaust ports, same combustion chambers, etc. Quote Link to comment Share on other sites More sharing options...
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