i recently supercharged my 98 3.8 v6 mustang with an eaton m90 off of a 1998 grandprix gtp. i built my own upper intake out off steel bolted the supercharger right to it and ran it off of the main serpentine. i used stock throttle body, stock maf, stock everything except for injectors out of a mid 90s lt1 chev. no computer tune.... and im am producing huge amounts of hp... i also bored and milled a stock size eaton m62 pulley to fit my m90... im running about 10 psi at redline.... it idles...

Opinions on absolutly necessary mods for supercharger?