Webers on TRs

[highwaystar@juno.com (Highway Star)]

Ok-

Now that pre '68 cars need no smog in California.  Thanks to Glenn's
input I may consider to acquire more power out of the TR250. This is
specifically addressed to those who have webers on their TRs.  Some
simple questions:

-What's the HP increase by doing this? 
-Worth the cost?  I figure $1,000 for the carbs and another $500 for
installation headache?
-Hard to maintain?
-Is my car going to sound like a hot rod? Positive answer to this
question is enough for me not to do it :)

Thanks-
Pouya