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The complete engine, including EFI, is on the engine dynamometer at Smeding Performance, ready for some flogging in the name of editorial greatness. The GM mass air meter sourced from Professional Mass Air Systems (PMAS), with its tiny sensing wires, sits directly atop the throttle body. The Mass-Flo system uses PMAS air meters and a proprietary converter box for the Ford-based ECM to communicate with the GM-based air meter. The air meter will be protected when the air cleaner assembly is installed.