That oil consumption is pretty normal, with new seals it won't change a lot even with new guides. I did the gasket because it leaked on my M103 at 280K. The head needed no work other a very minor skim cut and new seals.

I'd focus more on the timing chain and if the car is a long term keeper get the parts to do a valve job if one is needed later as parts could get difficult to find. A head gasket, new bolts, valve seals and guides and store them. Valves are pricey to buy them for an unknown IMO.

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