Ford 260-289-302 V8 RPM AIR-GAP 302 (1500-6500 rpm) Designed for street 289-302 c.i.d. Ford V8s, the RPM Air-Gap incorporates the same race-winning technology that's been used on our Victor Series competition intakes for years. The air-gap design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge for more power. Includes nitrous bosses. No provision for exhaust heated chokes and no exhaust crossover. Aftermarket 4-bbl carbs are not compatible with Ford Auto Overdrive Transmission (AOD) unless used with Lokar bracket SRK-4000. Available with standard finish or new EnduraShine finish for a look you've go to see to belive. Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 600-800 cfm, for auto. trans. use our #1483 & #1490 or #1844 & #1845 Installation Notes: Will not fit 255 c.i.d. V8. Recommended intake gasket: Edelbrock #7220. Manifold Height: A-4.30", B-5.50" see A/B Measurements. Carb pad height: 4.90". Port exit dimensions: 1.04" x 1.85".