Blowing black smoke, replaced injectors, checked timing stretch

[petecooke]

I have a 84 300sd and it's blowing lots of black smoke on acceleration. I've changed the injectors and this helped slightly but it's still blowing black smoke.

I also adjusted the valves.

The car have 262k miles on it so I thought the timing chain would need to be replaced. I pulled the valve cover off and the timing looks to be ok.

I also did a diesel purge but this didn't help.

Please look at the attached photos and let me know it the marks look off.

http://picasaweb.google.com/113096178938701157989/RecentlyUpdated?authkey=Gv1sRgCLKaxbzznY7ZeA&feat=directlink#

http://tinyurl.com/26d77zt

What should be my next step to resolve this issue?
Any idea?

Thx.

pete