I won't open up a can of worms here. Let's just say that "I don't like them". I'm sure that there are some people that use them. I'm from the "old school" and favor the Stromberg's and Zenith single barrels, mainly because they are a simple design and have less restricting air flow.
BUT:
You may want to check this out.~~~~~~~~~~ I intend to check this out just haven't yet.
http://www.parts123.com/PartFrame.asp?ZTM=cadegdha&GHOME=www.vintagespeed.com&TITLE=VINTAGE_SPEED "847 HOLLEY
This is our most popular carb for inline 6 dual setups. I have these running on 6 cyl. fords --Studes--plymouths and chevs. These are simple carbs that work well in dual applications. It came stock on early ford flathead sixes and is actually 1/2 of a holley 94. In fact many of the parts for the 94 fit this carb such as the float and needle-seat assembly.-and I have all parts available. This is in our hot rod gold finish completely rebuilt. The base is the standard 2 bolt that fits a lot of the aftermarket intakes. Give me the center to center distance on your intake studs and I will see that you get the right base to fit. These flow about 140 cfm each. If you order two or three for a system--tell me what there going on and I will size the jets and rework the power circuits for your application. You'll love these carbs"
