Member wet-buffalo was putting one on his 3.4L two years ago, I don't know if he ever actually completed it. I thought someone else did have one installed but I can't locate the thread. Maybe it was someone on the 60 Degree V6 forum??
I know of a few pick-up trucks that use it. It is designed to mount on it's own lower intake because it is a roots style.
Fageol does have the correct parts to install one on a Fiero. The only limitaion was you only had the 5psi or the 7psi pulley that you could use with the Fiero because of the size of the crank pulley. The 9 psi pulley only came in the 3" cog belt. The other thing was you had to use either a 2-bbl TPI, a 2-bbl vari-jet carb or the Holley 390 cfm 4-bbl carb on top of it. If I recall there was not enough room on the lower intake the install fuel injectors.
Somewhere I have a listing of parts available as well as the mechanical drawings for it. I was thinking of using one on my 3.4L originally. Back then (around 2003) it would have cost around $2100 for all the parts.
Some pics can be seen here:
http://614streets.com/Fageol.htmlHere is a TBI version (it was in a truck)

Here is what the S-10 $1950 kit looks like (Vari-Jet)