I have a Eaton m112 supercharger, I think it's off of a 2003-2004 svt cobra. I was curious if it would fit on my 2006 mustang GT, if so what would I have to do/or buy to get it to fit? I'm curious if it would be cheaper to use this or buy one that's made for the 3v.
Don't bother. It's old technology and even in the unlikely event that you find a lower intake manifold that fits on the 3v heads, it's still less efficient than modern supercharger kits. Just get a Department Of Boost GT450 or a Roush R2300 supercharger kit and be done with it.