I'm considering replacing the #14 cylinder head on my 300sdl with a #17 head from a 350SDL I found. My car has been displaying signs of a cracked head: smoke, disappearing coolant, high cold pressure in the coolant system, though no mixing oil/coolant. I'm also seeing oil seeping from the head gasket area. It could just be a head gasket, but since I plan on getting some more horsepower out of this car in the future, I figure I may as well replace the head while I'm in there. Is there anything I will need to do with the 17 head beyond simply swapping it out? I've read how some of the om603 heads have angled injectors, different injector threads, or different prechambers that require compensating for.

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1987 300SDL