e53 N62 removed and on a stand..what to do ??

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Hi all, I recently had major issues with my N62B44. Have opted to for garage to remove it for me so i can do valve Stem Seals and oil leak around alternator bracket cover. Figured $1200 to remove and put back in , compared to NZ$14K of labour to access $250 worth of parts was a smart choice if i have the skills confidence and interest. Happy to do valve stem seals with my new AGA Valve stem seals tool kit and now easy access to alternator bracket.. .. I figured I needed a "project" anyway ..

Question is ..

Since i have engine out .... What else should i do also, short of a full rebuild?????