Early ('74-77) Head Combustion Chamber

jimmyx

True Classic
Sorry for the poor pic, but if anyone has an early head in their stash, I'm looking edge-to-edge diameter in mm for the combustion chamber recess.
Thanks!

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I just now measured 2 of them at 86.5 and was surprised to find another measured 87.

You would think the production process would be more precise.

Pretty sure these heads were from 1974 128sl coupes.
 
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