Hi, new 450 SE owner here, '76 with 77K original miles. Car is in great shape for it's age, with very low mileage. Mechanic gave the thumbs up on engine/trans/suspension. Seats of course will need some work.
What I'm finding is that to get to 70 mph, rpms hover around 3500, a little higher (3700 or so) to get to 80 mph. Is this normal? Strikes me as a bit high. If so, how'd they manage this on the Autobahn back in the day?
Any pointers, suggestions, and institutional knowledge is greatly appreciated! Happy to be here!