In the case of a W115 it probably has the pneumatic governor with the buttery fly valve / throttle body on the intake - so that would have to go - and then there's the whole oil supply thing running from the intermediate shaft area into the IP that's needed for the MW pump (and the later M/RSF pump)...

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!