Measure chain stretch/wear first.

Both Gearhead and I have done 3 timing chains on OM617 turbo cars and it is not that hard. You do need the crimping tool and a temporary link, though. I have one concern about my 300SD but that is to be in another thread.

Upper control arms can be done without removing the spring and are not difficult at all. Shocks are the same, no need to remove the spring. However, if you are going that far, you might as well do the rest of the steering and suspension if it needs it. Piecemealing it will only make the end result take more time.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge