Vacuum advance

["Keith McGahan" <keithmcgahan@hotmail.com>]

On the way to work, the vacuum advance line that runs from the 
distributor to the carbs came loose and was snapped in half by the fan.  
My question is how important is the Vacuum Advance line.  Is it 
something that I need to replace right away? I would also like it if 
some could give me so clarification to the Vacuums lines 
purpose/function.  Thanks again.

Keith McGahan
64'TR4