Howdy:
You really need to get a book or two by engine guru David Vizard, a fella who has not only ideas, but literally decades of experience building and dyno testing his creations as research for books and articles. I have his book"How to build Max Performance Chevy small blocks on a budget" and it is the most informative book of it's kind I have owned since I started this car stuff back when I was in high school in the 1970's. The section on head porting is clearly written and well illustrated, and though I'd never owned a Chevy prior to the truck I bought last year, I was well equipped to do some port work on a set of Dart Iron Eagle SS sbc heads I'd picked up used. Vizard even outlines the best ways to keep cost of special tools to a minimum, like making a variable speed control for a single speed electric die grinder using a common light dimmer switch. I did so for my porting project-works great and was needed. 10,000 rpm was too fast for most work, and Lord help ya if a cutter is out of balance at that speed.
Another book that I do not have, but would likely be helpful by Vizard is "Volume 1 How to build horsepower"
Both are published by SA Design. You can likely order them on line if you can't find them locally.
Hope this helps ya'
cowboy33713