I know there was another thread about this car, but since this is more tech savy figured I'd post more info.
SVO used a Roush developed blower set up based of the good old Eaton M112 - just several years prior to the Terminator using that idea.
The blower was designed to use the stock inlet tubing/MAF/filter and stock TB. The air is compressed and blown upwards into the spyder of the plenum which arcs over and down the the heads. It can be used with PI heads with a little know how. Roush/SVO (via Ford) sold a top end kit that included the Roush/SVO heads as well. At 6 psi, the combo was good for a touch over 300 rwhp with a very conservative tune. A 9 psi pulley was around thanks to the aftermarket which stepped up the power.
Other than the blower snout poking out, the relocated alt is another give away that something isn't stock.