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Posted

Early 240's came with the E31 cylinder head. Later ones I'm not 100% sure..there are variations..

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Posted

Dimitri is correct, early series I 240z's had an E31 high quench chamber head.

 

The series II or late 71 onward had an early E88 head very similar to the E31, maybe slightly larger valves. (Can't recall exact difference).

 

The 260z though also had a E88 head but it was an Open Chamber design (not as high compression).

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