Ferrari: Time to rebuild the carbs?

I don't know if this group deals with tech stuff anymore, but here's a
question maybe someone can help me with.

I have a 77 308 GTB. I had a tune-up last summer but the carbs lost their
settings after a couple weeks, the screws didn't hold their tune. They also
drip small amounts of fuel while the engine is running. I'm guessing it's
time to rebuild them, but I just wanted a second opinion. How much should I
expect to pay a professional Ferrari shop to do the job, should it need it?

Cheers!

On Fri, 29 Apr 2005 07:40:36 GMT, "Paddington" <com>
wrote: 

....I can't but think leaking carbs are _begging_ for a rebuild.