Dyno Tune On Stock C-5

[TwistedFun]

one of the threads now has me currious, i have a stock 2000frc that i am considering selling so i can get a 2002 z06. if i end up not selling the car i want to put a 3.90 gear in the car and get a tune. what can i expect from a custom tune on the car in stock form. it does have cat backs and an after market intake. what kind of numbers do you normally see and what kind of sotp imporvement will i have. i am not looking for exact numbers because i realize all cars are unique in their own way, just a rough estimate. if i get the z then i might go with a tune on it also. also what kind of price am i looking at for a tune?