Welcome to Vincent ownership and, we hope soon, ridership!
I don't have the carb info handy, but you should take advantage of the excellent books available to help you make your Comet a reliable, fun bike. Know thy Beast, Richardson, Riders Manual, and the Spares List. Obtainable from the
Club Spares Co ,Coventry Spares (a US shop and an advertiser here), or
VinParts
Also, the SoCal Section is very active and
joining the Club would open up a lot of help.
Google "Burlen amal", they sell new carbs for Comets and Twins.