By the way Frans, above you said I should need a new head.
Is this also a possibility:

- weld up the pits/holes in the cilinderhead and flatten it
(the rest of the head is really fine I think)
- port and flow the cilinderhead

After that I have a really nice head I think,
which I can use in combination with a new 200 block with low compression pistons.

Would this be an option?