Originally Posted by ap72
a really good head shop won't care what make of engine they go on, its irrelevant.
I agree- the shop won't care- but I
Fluid dynamics and 'book learning' would lead one to believe there are many similarities in port flow dynamics regardless of the head design and application, and as far as that goes, it's true. But there are distinct advantages in choosing a company who's expertise is modifying the same head that you're working with.
The techniques/tricks of the trade and experience needed to do good work on any particular head doesn't come easily. Hundreds of hours can be tied up in a CNC program for just one port. A good shop might be expert in several makes/types of heads, but be sure of this before
you contract to have your head done by any shop. It is a very specialized field, unless you're just talking about a routine valve job or rebuild.
I would recommend doing research to find out who is running good and winning using the head/engine you are working with. From there, find out who is doing the head work. Talk to guys who are racing in the class you're interested in, or who are building the engines for that class, etc. I'll be willing to bet that there'll be a few names you'll hear repeatedly.