My 1977 rebuilt motor broke a cam chain and destroyed the motor.
I have two spare motors but decided to restore the whole car and install a OM617.952 turbo motor.
All that was fine but for the turbo head does not have the SLS drive boss. I can, if I must, install a tandem power stering and SLS pump. My mechanic has a spare which could be installed with a custom bracket required.

My question; can I take all the ancillaries off the turbo head, install these on the OM617.912 head, which has the SLS drive, and use that head on the OM617.952 motor??

My concern, in part, is that the .912 runs higher compression and even if clearance in not an issue, it may produce too much compression in the .952 with the turbo adding an addition 13psi. ALSO, there is the issue of oil and water galleys alignment and heat management in the turbo head.

I attached a photo of the engine bay almost ready to go to paint. You wouldn't believe what it took to get the fenders off.
The other photo is so sad.

All assistance gratefully received .
Cheers
Graeme

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Side-by-side it would appear that the "chamber" of each of the heads is the same. The actual combustion chamber is almost entirely in the piston, and changes in the piston volume account for changes in compression ratio.

Thanks Frank, there is hope then that a simple head swap could work.
The valves would probably need to go across as I think they are sodium filled to handle the extra heat.