I can either get a Mazda RX-7 with 33,000 miles on it for $19,500 or a Toyota Supra that has 82,000 miles on it for $17,000. I'm probably going to have to buy the Mazda because I keep getting told that 80,000 miles on a car makes it too old. Would the RX-7 be able to achieve around 600hp when modified?