Danny,
The chevytalk forum has a section dedicated specifically to your issue:
https://www.chevytalk.org/fusionbb/showforum.php?fid/35/keyword/Fuel_Injection/On chevytalk the "Chevy High Performance Topics" moderator, handle "Grumpyvette", answers questions with a brief summary statement and also links to a lot of published articles on whatever the subject is. It's a great forum for people who like to thoroughly investigate whatever they're working on at the moment.
Here's a typical example of a Grumpy summary statement:
"I run into so many guys that think you can just un-package new cylinder heads and slap them on any engine they build , and expect those heads to function flawlessly.
there is almost always at least an extra 15-hp-20-hp or more potentially easily accessed through minor port clean-up.
if your willing to disassemble the heads, port match the runners and clear up the casting flaws and smooth and contour the bowl area under the valves you could rather easily double or in some cases triple those potential power gains just by improving the port contours and removing casting flaws."
It is followed by a long list of links to further explain the concept. His stuff is great reading for people who really want to understand what's going on inside an engine and how to make improvements.
