There just aluminum heads, anybody can work on them. I would be more concerned about finding a good machine shop, instead of one that "knows" that head. Aluminum heads do not present a challenge for most shops, as they have been around for 80 some years now.
Theres no magic in them.
Kary


1987 Mitsubishi Pajero "Modified"
The other original Mitsu brother
Northwest Trailmaster