Grasshoper needs guidance - M130 Timing adj
 

Hi - I am new to the forum and honestly it's been about 25yrs since I wrenched on a car. I have come seeking help and hoping you will entertain what is probably a dumb question: How do I change the engine timing? I have the engine ATDC (the marks on the cam tower are lined up) and when i look down at the counter balance it reads "10" (i will try to attach the pic). So...should the counter balance read zero at this point or at 8 degrees which is what the Haynes manual is telling me? And if it's wrong, how do I change it? Thank you for any help you can provide. Cheers!
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The back story: I recently bought a 1970 W108 280SEL with the M130 motor. I am going through the 'list' of things to refresh and educate myself. I have already changed the oil & filter, upgraded swollen/cracked hoses, adjusted & lubed throttle linkage, flushed radiator and replaced thermostat. Now onto timing, replacing distributor (not sparking evenly).

In inquiring about timing, a basic question arises: Do you wish to change camshaft timing, or ignition timing?
The reference to a Haynes manual suggests that it is ignition timing.
Ignition timing is adjusted by loosening the distributor clamp, and rotating the distributor to achieve the desired timing (spark point).

Sorry, yes, ignition timing and thank you very much. I am now recalling as a teen tinkering on my first toyota truck... i was turning the distributor to adjust.

After getting the car I noticed slight hiccups at idle and after warm up. I did forget to mention i replaced plugs which were black & moist. I am going to make the ignition adjustment this weekend and see how it goes. Thx again!