I would be hesitant about the OM603 gasket replacement. Aluminum heads are far less forgiving than cast iron ones and the OM603 head doesn't have the greatest track record. If I had to do both myself I would do the OM617 first.

Make sure you retorque the head bolts in the right order, then double check their torque after they are all installed

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

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