We highly recommend this manifold/carb combination for street driving. It will perform well with a stock or modified engine. This is the correct Holley 390 (0-6299) for the small engines . This carb gives excellent gas mileage, as the primary bores of the 390 are actually smaller than the stock Pinto carb bores. When you get up in the rev range the vacuum operated oversize secondary bores open up for plenty of power. The kit comes with a linkage kit to ease installation. There is also a chrome air cleaner assembly that comes with this kit (not shown).