Sounds like a lot of work & money to drive a car slower then the one you own!
It would be nice if you just had to pay for the gas you put into it and maintenance costs..Its an 03 so insurance probably wont be as much as the Z, but its a coupe so you never know.
If it costs more than a thousand bucks for 6 months, then i wouldnt do it.
http://www.youtube.com/watch?v=rikuKmQTbH8