3.6 and 3.5 pulley might be best there for your genV.
As far as tuning goes, see if someone local to you tunes. Nothing beats a true street tune made just for your car.
yea i could probably find some one around who can tune it. i know i can drop to low on a GenV so what you said sounds about right. a few mods i forgot to list were aeroforce interceptor scan gauge and a wideband
97 GTP DD, 1952 Ford F-1 Resto Project, 2006 Mustang GT "UnDeR CoNsTrUcTiOn", 02 GPGT SOLD!, 98 GTP Parted/Scraped