dual weber carbs

sup guys I have a question and I'm hopeing I can get some help here. well my question is I'm purchasing some dual weber carbs and I want to install them in my 91 isuzu the truck has a 2.3 but I want to know is what do I need and who can help me out on ordering any parts for this to happen . I'm out California so if there is anybody that can help I would very appreciate the help. thanks guys