Sorry, missed the response. mains are the HS air bleeds. My post above was serious, with the large single butterflies getting sufficient signal is a serious issue, for a NA engine. With the blower the use for emulsion to stimulate fuel flow at low speeds will probably not be needed. If it were me I would try a small HS bleed, and if the emulsion is threaded plug all but the kill bleed. If it's not threaded and plug them. Then see how the engine responds.