I put a Weber side draft on my 2nd gen motor. I don't have a manual for the carb and know nothing at all about it. Is there any place I can get a manual for it? or does somebody have one they can scan for me? also, my friend thinks something is missing from the carb. When you take the big round brass cap off the top, there are 2 big hollow slotted screws and 2 smaller screws. My friend thinks there should be something inside those 2 bigger screws but there isn't. Can anybody comment? Can anybody tell me how they got the carbs properly adjusted?

thanks,
Tom