Honestly I think the decision depends on what you want. If your "all about" the supercharger then I would look at buying an aftermarket centrifugal type. The aftermarket systems will potentially make more power than the factory Ford blower and you can update the existing computer to make it work. Once nice thing about that is that you have actually customized your car to your liking versus just transplanting a different version of a factory engine. In the end it is up to what you like.
Hope this helps
You can also email Jay Roeder at firstname.lastname@example.org