Considering a fox weighs more and a lot of them came with 2.73 gears I can believe it. Drive an SOHC 4.0L if you think the OHV is quick.
Once you get farther in your auto class, hopefully you'll understand how the engine behaves as a "whole". Spark plugs, for instance, ignite the compressed air/fuel. A flame front travels away in every direction expanding as it travels toward the piston/cylinder/head. Even if I stop here, you can follow and assume that a "fancy" spark plug will do exactly the same thing as a stock plug. How do you presume more power from a fancy plug than a stock plug? (assuming of course the stock plug is still in good operating condition.). I'm not being a dick here, I want you to really think about it.
Lets pick apart the pulstar plug. I've searched, and it appears that they use a capacitor to store energy from the coil. However, your plug does not recieve voltage until it fires. While I admit I am more familiar with capacitors in AC voltages (we use them to counter reactance and to balance counter-electromotive forces to make motors and transformers more efficient) the basics of a capacitor in DC theory are very simple. In its simplest form, you have two plates and a dielectric fluid. As one plate becomes negatively charged (excess electrons) they seek to move through the dielectric fluid to the other plate when the circuit closes. The more surface area you have between the plates, the more capacitance it has. In DC current your capacitor "charges" and all those electrons are waiting for a complete circuit path to transfer to the other plate. When there is a completed path, they discharge. My problem, is that the spark plug itself is nothing more than a simple series circuit closed all the time. Electrons travel from the ground strap through the air gap (this is your resistance and is why we need more EMF to be able to move any current) to the electrode and back through the wire. So as soon as you apply a voltage to the capacitor, it will discharge at the same rate as it is charged because it is in series with a closed circuit. Besides, a capacitor that is small enough to fit inside a spark plug will not have enough capacitance to make any substantial difference.
Now lets look at the "idea" of the capacitor. Pulstar's selling claim is that it increases peak voltage. Well, Ford has a reliable and adequate ignition system from the factory. The spark is plenty hot enough to start the flame front. If we double the voltage, we should not see any increase in power. Why? Well they both lit the flame. The flame front travels at the same speed (I think roughly 16-17m/s) when it is lit, regardless of what lit it. Simplest example. I fill a garbage can lid with gasoline 1/4" thick. I have a high speed camera and I'm going to measure how long it takes for the flame to travel from one side to the other. First I use a match. Then I use a torch. Both lit in the same spot, both flames take the same time to get to the other end, yet the torch has 100 times more energy than the match.
For the record, if you really want to increase your power output and still be able to pass emissions and have stock drivability properly setup forced induction should be first on your list.