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The Edelbrock intake manifold has provisions for the LS1 timing control module to bolt directly to it, easing installation. The timing control module's harness is designed as a plug-and-play unit with corresponding connectors for the crankshaft position sensor and the MAP sensor. This is one of the other items that went with the original EFI components that needs to be replaced. This attaches to the rear carb stub and a 1/4-inch hose connects the sensor to the fitting below the carb.