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srg610; What Moper said. Ask the faster/long time running MoPar guys, if not all of them who they use. Also, the amount of head porting is not dependent on overbore, but more on what cam you have or will have and goal intended. It is possible to run 12's with a stock head and minor prep work without bowl porting.

Without upsetting a machinest while looking for a abit of work to be done, I would (I have) walked in and simply said, I would like these heads preped for light track use. He'll ask you how much lift your cam has. This puts him in the area needed for the amount of work.

...For a nice street preped engine, under .500 lift, I have had my heads done like this in the past;

Back cut valves. (Stainless when I had the money. LOL)
Multi angle valve job on the seats
Gasket match the ports
Shorten valve guides and better seals. This may be mandotory with some cams/spring combos. Often, Comp Cams will need the spring area worked on for there springs to be installed.
I ask for the head surface to be trued with multi cuts of the head and as little as possible to be taken off to meet that. Equalize the head chambers cc's.

I'll describe this work and listen to his suggestions on top of it all. Then ethier agree or just say no, this work is good enuff for the idea/level of use.
Sometimes they suggest larger valves or bowl work on top of it.