The Edelbrock RPM Air-Gap #75764 intake manifold is designed for 340-360 c.i.d. Chrysler V8's and 318 c.i.d. engines with 340-360 cylinder heads, 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. Accepts 1975 and earlier waterneck only. No provision for exhaust heated chokes and no exhaust crossover. Will not accept stock Thermo-Quad carburetor. Will not fit 1992 and later Magnum engines. Includes nitrous bosses.