Hey Motorhead,
Not sure exactly the thread you're referring to but there is this thread from a little while back:
Weber Jetting Survey
...and some really good info on webers available on the GT40s.com site which is quite informative.
Weber Venturi Size, Peak Power and Choke Size, 8 Barrel Venturi Size - GT40s.com
Good luck in your hunt. I love seeing cobras with webers... and may chose to go that route myself one day.