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Yes, a high performance intake manifold such as the one edelbrock makes would create more power especially when combined with other intake mods such as K&N, etc.
If you play around with engine mods that severly change the airflow, your speed density computer will not be able to see compensate and you will have a crappy idle and powerband.
Mass Air has a meter in your intake tube that actually measures how much air is entering your engine. Speed Density uses various pressure sensors and "guesses" how much air is in your engine from a predetermined database in the ECU based on the sensor readings.
The Edelbrock intake and respective throttle bodies along with K&N filter(s) are rarely enough to mess with the speed density computer. Speed density doens't like things like bigger cams and valves or changes in combustion chamber volume. For the most part, the bolt-on HP improvement parts like the intakes and throttle bodies even when used in conjunction with headers and high flow exhaust will still run fine on a speed density equipped truck.