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After the aluminum 509 block was announced, Hilborn contacted Lamar and wanted to do a retro fuel injection unit. The Hilborn unit has bosses for mechanical or electronic fuel injection, and three sizes of butterflies. This is the first, and uses 2.5-inch butterflies, 60-pound injectors, and is controlled by a FAST computer system and distributor. The 3-piece intake (injector banks and a separate valley cover) was powder coated black.