Classic Holley carbs have been a staple for rodders around the world for decades. Theyre calibrated for use on stock to mildly modified vehicles and have that classic Holley look. Holleys 0-8007 is calibrated and intended for small V8s or 6 cylinder engines as well as 2x4 street tunnel ram style set ups. Plus, it is Gold Dichromate coated for durability and classic Holley looks. Dont trust your performance to just anyone, Holley is the only modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60s.