I am buying a '67 GTO that has been sitting in a garage for 6 years. The engine was rebuilt back then and it was pretty much parked. He just put a battery in it, a starter, rebuilt the carb and put a new ac compressor and hoses in it. I should get this car next week. How should I "break it in" or bring it back to life? Any things I should look for or take care of or should it be good to go?