98 with 81,000 miles
I bought mine used with only 19K miles, and didn't find out it had been through the paint shop once before until I got it into my garage. The Carfax came up negative, so don't trust that 100%, either.
Adding more power to higher mileage cars also has its risks unless you plan to put in forged components, then you would be rebuilding it anyway. Depending on the care the previous owner(s) took in changing the oil and keeping it maintained, there could be excessive wear in it that could make it less reliable once you start adding modifications and more power. If possible, the best thing to do would be to talk to the previous owner(s).
I have since done heads, cam and headers and the last trip I went on it got 29mpg and 30 mpg on the way home. Runs great!
I looked at a few other FRC's (what I was looking for, din't want a coupe) this car was in better running and better looking condition than any other FRC I drove or looked at with way less miles. I really did not want to pay extra for the Z06 as I plannend to mod it, and enjoy doing the work. Miles didn't really scare me.
Just be sure to look at the cars and drive them and ask for records and such. You can get a low mile car that has been beat on and the person is a car hopper (plenty of them out there). Be careful and good luck!
Derek

