The problem is how to run boost. The Tork Tech setup also comes with a cross brace that mounts to the front of the engine that contains the idler assembly. It has a PS relocate bracket, a alternator relocate, a damper and secondary lower pulley that drives the blower. The problem was, that if you run the blower off the stock accessory belt, you would never make any boost. As you all know, the Lightnings and Cobras all run a MUCH larger secondary pulley on the bottom. It would be like putting a 6 inch crank pulley on a 03-04 Cobra which now has a 7 3/4 crank pulley. figure every half inch of pulley diameter is worth about 2 pounds of boost, so even if you went to a 2.8 upper, maximum boost would only ever be 5.5-6 pounds.
Thats why the manifold by itself would not do the trick.