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Themanifold/kit is designed to work with everything from a stock motor up to a fully built race-oriented set up. It will work great for you, and give you room to make more power down the line.
Bone stock motorwill make just under 300 hp to the wheels. Stock Cobra blower pulley will spin about 10-12 psi (Nathan see's 10 psi with his, but has improved heads that don't restrict the flow). As for upper limits, I ran a 10% over drive crank pulley and a 2.76" blower pulley and was flirting with 20 psi or so. But none of my junk is stock, so it's hard to say what it would do on a bone stock motor until someone tests it out.
But yes, the kit and the upgraded fuel system is all that is needed.