Welcome!!!!
If you just had a major, the shop should have checked everything out. There isn't much you can't get to with the engine out.
My advice is to drive her often. I drive mine at least once a week. Not just around the corner either. Myself and a few other local guys drive 30-50 miles when we gather. Probably one of the reasons I have had virtually zero issues with the car. However, these toys are machines and are prone to breaking. What looks fine today may not be fine tomorrow.
One good thing to look for, and be aware of on the 348 is Electrolysis in the cooling system. Again, the shop should have noticed this condition if it existed on your car.
Check out the following link.
http://www.ferrari-talk.com/discus/m.../3111/791.html
Also, post a pic of your car in your profile.
BTW, Nip Tuck is awesome!!!