In need of a quality replacement for that worn-out Q-Jet? Look no further than OPGI with these “Streetmaster” carburetors from Sean Murphy Induction (SMI). Whether your engine is stock or loaded with performance parts, we've got you covered. Each unit is completely disassembled, cleaned and recolored. During assembly, the throttle shafts are bushed, all casting plugs are sealed with epoxy to prevent leaks and top-quality components are used throughout.
STAGE I: Intended for stock 350-400-455 (Non-Ram Air, super-duty or H.O.). Fits engines with spread bore intake manifolds. Carburetors are equipped with electric choke as well as a front inlet for fuel. Minor linkage modification may be necessary. STAGE II: Intended for mildly modified 350-400-455 engines. Equipped with electric choke and front fuel inlet. Recommended modifications include: camshaft duration of 208°-224° @ .050", compression ratio between 8.5-10:1 mildly ported iron heads or Edelbrock aluminum heads, aluminum intake and headers.