Leveling kits and a body lift are two entirely different things. The confusion may come in due to the fact it's almost unhead of to do a body lift on a vehicle that isn't also lifted in the suspension.
The Daystar (of several other names like Cornfed, etc.) is a spacer lift of the suspension. That is a spacer is put on the top of the coil that lifts the car upward from the stock position of the suspension, a set amont of inches. Usually 2.5 or 3 inches. A body lift is only changing the position of the body of the car upward from the frame, while not affecting the suspension.