So a friend of mine is getting a DX coupe, 1994, 5 spd, etc, And I went to go look at it with him today, Everything looked good apart from the engine, The block was a d15, which I expected the whole thing to be, but it had a d16 head on it? I didnt know why it would be one there, and I told him we would go look at it after I knew what was up with that. Any ideas on why it might be on there? are the d16 heads universal with the d15's?