Hello everyone!

Previously I posted thread about buying #10 head, that in the end was returned back to seller:
Wrong 3.5L head for my 3.0L OM603?

I have found a #20 head, that have no cracks or corrosion. Planning on preparing it as much as I can for a head swap for my cracked #15 head I have now.
One thing that I was dissapointed about is the fact that this head hasn't got 3 prechambers in it, other 3 prechambers look little bit different from mine. Seller said that these prechambers are just missing some parts.

It looks like I will just have to put in mine prechambers.
Here is the problem/concern. #20 head should have the same inclined injectors as mine #15 if this head haven't been machined to old prechambers. There are some marks of some work for prechambers. This is why I am concerned. I have no expirience on working with prechambers. In previous work I have allways kept them untouched.

Could someone tell me if these prechambers are inclined or non-inclined?
If prechambers are non-inclined could I fit mine inclined prechambers to these ports in #20 head?

Would be thankful for any information/opinion!

2 Pictures attached - with and without prechamber.
Higher quality pictures here (onedrive):
http://1drv.ms/1BTrn2U

Regards,
Vilnis

Attached Thumbnails

   

__________________
1989 300D Turbo, w124 sedan, OM603 + 722.3