This intake manifold will compatible with 1967-2003 Small Block Chrysler/Mopar 318, 340 & 360. 【NOTE】Accepts 4150/4160 4-BBL square bore carburetors. 【DUAL DESIGN】Dual Plane design for optimum fuel distribution; Dual bolt pattern compatible with 1967-1991 318 and 1992-2003 318 Magnum V8 Engines.