I don't see any reason for you to buy a DIS-4 and Accel coil packs.
I would estimate you would see next to nothing on the dyno from the above.
Remember the basics: Fuel, Air, Spark
Fuel: Pressure and Injectore size
Air: amount and density of air coming into the combustion chamber
Spark: the catalyst that produces horsepower from the first two
If you are near stock as far as fuel and air are concerned, your stock ignition hardware should be fine.
Now if you go to forced induction, THATS another story...
