I cannot seem to find a lace to buy the rack damper or dampner or governor idle screw. Is there a more technical name for this item?
Also where does on find an updated primer for a 83 300 sd?

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1983 Mecedes 300 SD with 383K plus motor and trany rebuilt within the past 50K.
1984 Mecedes D 254K
Planning to make both veggie cars