hiya boyz, I was looking about for a machine shop that would do my 4k head. "porting the head to 30mm and maxing out the valve size."
I found this place, they are a cnc workshop.
The first head costs the most, as they have too write the programe. I was quoted 1200 for the first run and cheaper for ever one after.
the more they do the cheaper it gets.
http://www.kostecki.com.au/index_home.php
If you know of any one that can do it cheaper post it up.
btw: they can do any head