Josep,
The only things in the positive side are the body - Fastback, the year - 66, and the engine - 289 (I assume it is, and not a 302).
On the negative side, it's in fair shape - rust, your location - the Med, a lot of work and money to get the car into shape. You have got to be dedicated (and have a few extra Euros laying around).
Have a glass of wine with dinner and think on it.
Jim