Before the Supercharger Forum was opened there was a guy who put a Holley kit on his Super Duty. Search all forums for "Holley Supercharger". As I recall, it was a PITA to get installed because some of the parts didn't fit and the kit wasn't very complete but he was very happy with the final results.
99 Expedition EB
5.4l, 4x4, 4.10 LS, 285/70-17 BFG AT-KO's, Factory Tow with Extra 24k Trans Cooler
Magnacharger with Lightning I/C Pump Mod, WMS Tube, JBA Titanium Shorty Headers, Bassani/Gibson Cat Back Exhaust, Superchip Flipchip, PIAA Superwhites, Autometer Sport Comp Boost/Vac, Trans Temp, Fuel Press in 3 gauge pillar pod, Hellwig Rear Sway Bar, Motorcraft AGSF12FM1F4 plugs.
Current Project - BQuiet Extreme Throughout Truck - going very slow
Coming Soon - Remote Mount Oil Filter and Extra Engine Oil Cooler, Speaker Upgrades.