Are there any differences between the US and Euro cylinder heads on the M116 and 117 motors? CC volume, valve sizing, port size, etc

I have a chance to pick up a pair of Euro heads, cams, and manifolds here for next to nothing price wise and am curious if it'd be worth it...

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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