As far as getting a car accepted to pebble beach before it is restored is very common practice. There is a application process where you tell them about the car and depending on rarity, past history and style they will decide if they want it on the field. Very important cars that are under restoration are a pretty easy write in. Also Pebble also invites cars based on the classes in which they have in the next year. Believe it or not there are alot of older restorations that go because of the need to fill classes. But if you have a car you think could make the lawn you can apply and see what they say. Also every year some cars don't get finished in time and have to pull out before the show. At that point they will call people up to fill the spots.