Rare E31 head 1970 240z

Your valve cover says Nissan OHC, the head is what the valve cover sits on.

Go over to the passenger side of the engine and look between the the 1st and 2nd sparkplug, there will be a raised letter/numbers, that is your cylinder head ID.

Chris

Hi, Not sure if anyone is still posting to this thread - but I'm trying to figure out if my 1970 240z has the original E31 engine.  I think not but I'd like to know how to tell for sure?  Is there an engine model or ID number on there somewhere I can look for?  Mine says Nissan OHC on the top and I think the E31 said something else.

 

Thanks