Our tests were comprehensive. We actually ran four different intakes and a variety of spacers on the engine. It's also interesting to note that the engine in question works perfectly with unleaded pump gas, coupled with a very simple 780 Holley combination. The bottom line here is, for a street/strip Chevy, you don't really need exotic parts. Run-of-the-mill pieces work just fine. Just keep in mind there's power in intake manifolds, particularly if you select the right intake for the application.