I only own 3 cars with the bird being one of them... just have feelings about it... I had the car back in highschool...
I have heard of so many people missing their high school car. Either they sold it or it was wrecked backed then. Like Wouter said, if space and money is not the issue I would hang on to it as long as it's not rusting away. As you get older, you might change you mind and get a second wind to restoring it. Once it's gone, it's gone. You can always sell it later if you still feel the same way.
"An ignorant man thinks he knows everything, a wise man knows he doesn't."