One problem I found with the articles on different intakes was that it did not work on another engine the same way. I tested at least 4 of those intakes, ported them, and tested them with different spacers, and did not get similar results. Maybe it is a chevy thing, but on all the dyno testing I have done in the last couple of years, things just don't always work as printed in those magazine articles. I think I ported at least 10 intakes for this year's EMC entries for folks, and the results were mixed at best. Plenum divider slots vs no slots was a mixed bag of results with different horsepower levels on same type of engine, but 200 hp difference caused differing outcomes of whether the divider liked the slot or not. Lots of variables, and lots of testing needed to find the absolute best combination for whatever intake is being used and on how many cubic inches that same intake works with.