Weber DGV are they the same?

[Enrique Claure <spanlab@ceibo.entelnet.bo>]

I found a very nice write up of how to tune DGV Weber 
carburators 
http://dimequarterly.tierranet.com/articles/tech_weber_tuning02.html

in the Datsun 510 page Dime Quarterly. My question is, is the weber DGV a 
single weber or are there variation of the carb? Enrique
SPAN Inc HeadQuarter
PO BOX 6524
La Paz Bolivia
South America