Siitting at 275,000 miles.

No issues, but thinking of changing the headgasket.
Most of the threads I've read here are after a blow out.

Compression is between 365-390 across cylinders, though oil burning at highway speed is about half a quart every 600miles –I have changed valve stem seals.

Curious if anyone here has done such a thing and a.) found no reason to do anything else to the head ie, simple swap b.) performed any other pre-emptive maintenance while the head was off eg timing chain/rails/ tensioner.

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1981 240D 4sp manual. Ivory White.