I have a RK sport front lip for sale... I havent used it for 3 years now and its just sitting in my basement..
looks like this
The First Twin Charged jbody
blue car (R.I.P) - 240whp @7psi..
silver car - 305whp 315lbs.tq @15psi (91 Octane) or 420whp & 425lbs.TQ @20psi (94 octane+Alcohol Injection)
All dynos run on a Mustang dyno
that will fit a GT with a little modification, I've seen it done before