I suspect it is not valve adjustment, as the shaking at idle was an issue with the car ever since I got it (and the PO noted it before). Even immediately after the valves were adjusted it would shake like this.

I assume that aside from fuel economy I'll go through motor mounts and air cleaner mounts quickly, but is there anything else to watch out for?
Also, since the numbers didn't climb much with the oil, I'll assume that it's likely in the top end. How possible is it a head gasket Vs, valves? There is a little pressure in the cooling system...
-nB

__________________
'83 300D Turbo
Current: ???K mi - 19.2mpg -> 17.4mpg -> 22.9mpg ---> ODO Died
bought at: 233.8K mi - 10MPG For $1.00
3.5 cylinders work: 320 320 100 340 280
Got insurance? FarmersReallySucks.Com