Yes, an SD car will run like raped ape on a Kenne Bell. How much time will you cut off your quarter? That will depend on a lot more than just your power.
There's a couple of wrinkles. It's sooooooo tempting just to throw the Blowzilla kit on and call it a day. This option if fine so long as you don't plan on doing any futher engine mods (i.e. heads, intake, cam, displacement, etc). Your limiting factor will be the amount of fuel you can push through the tiny 19 lb injectors. Even the small kit can generate more boost than the injectors can keep up with.
There are a few things that you're going to need in addition to what's in the kit:
You'll need a wideband O2 meter, a fuel pressure gauge, and a boost/vac gauge. You will also need a 255L fuel pump, a KB boost-a-pump, and KB boost-a-spark. None of these items are negotiable with the exception of the maybe the boost gauge (scratch that, after further thought, I'll say this is required as well).
The combination of the AFR meter, fuel gauge, and boost pressure gauge, will keep you ontop of the fuel system so that you know everything is tracking. Just as SOON as that bypass valve closes, you'll be seeing fuel and boost tracking together. (A tiny trick for monitoring this is to rotate the gauges so that the boost and fuel needs both point straight up when hard on the throttle).
The kit comes with an FMU and will run your fuel pressure into the 90 psi range. I mention this because you should have your injectors cleaned and flow checked prior to install. If you have any that are marginally high or low, then they should be replaced (not all of them, just the bastard children).
The problem that you'll run into is the inability to tune for larger injectors. There have been mixed results with slapping 24 lb injectors into SD cars with the stock computer. Another caveat (that I'm less familiar with) are the ability of some of the tuners on the market to tune SD computers. Do some research on TwEECer, Moates(sp), and the Anderson PMS. The TwEECer, I'm pretty sure, can be used on SD cars but it's a PITA IMO, and not worth much. I've no experience with the Moates(sp) at all, and none with the PMS on SD cars. There may be others out there by now that are SD friendly.
SD responds very well to boost and so long as AFR is good, it's a very easy system to fine tune and adjust. On 6-9 psi (again, fuel being your limiting factor), you can expect something in the range of 300 hp and even more torque, on a motor in good condition.
In short, you'll love it.
Were it me, I'd opt for the Flowzilla/Blowzilla kit and keep boost down until I were able to meet the demands of the fuel system. Once again, SD is not the limiting factor, the 19 lb injectors are. This way, you'll only be forking out money for the blower one time.
There are SD friendly cams out there that favor the exhaust side a bit more. These are great for KB setups in that they'll eliminate that top end, "fall off" you hear so much about with positive displacement blowers, when combined with good headers and exhaust. Most of that is the result of poor exhaust scavenging and not the PD blower itself (particularly at these low boost levels).
A final thought... Don't expect to hear the blower whine of Termi with this setup. There's no intercooler to make whistling noises and not enough air in the blower (at this level) to really whine a whole lot. It'll make a great sleeper mod! One other thing is that if you find yourself wanting and able to suppport more boost, think about opening up the inlet tract before reaching for blower pullies. These blowers are pretty sensitive to inlet restrictions. Merely swapping to a larger TB and spacer can net 3 psi or more.
Expect to have to do some beating and banging on the firewall seam with the Flowzilla. The inlet is huge and has to be shoe-horned into position.
