04. Carefully lower the ATOMIC EFI throttle body onto the manifold flange where the carb used to sit. Be sure to not pinch any of the wires underneath it while installing. The passenger side of the throttle body contains all the good stuff. Under the MSD logo is the brains of the system, the ECU. There’s no bulky computer to mount somewhere in the car with an equally bulky wiring harness. It is right there on the throttle body. Also take note of the single fuel inlet. No gigantic fuel rails and braided lines running all over the engine. Finally, all the wires run out of the passenger-side rear corner to aid in routing the wires and making for a cleaner installation.