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!