Are you referring to the cam bearings not lining up or the journal/lobes?

I have two different M110 engines in my shop.

One is a 1978 W116 280SE and the other is from a 1973 280.

There is a difference in the cam boxes.

1978 W116 280SE:



1973 W114 280:



Note the difference of the cam bearings. The '78 fuelie has 5 bearings on the intake cam and 6 on the exhaust.

The '73 (carb'ed) has 7 bearings on the intake and 8 on the exhaust.

Don't know whether it is due to model year differences or injection vs. carburetion. I suspect it is due to injection but I've been wrong before.

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