Hi sweet66coupe,
The Holley-Weber 5200 series carb makes a great upgrade. To install one you will need a carb to manifold adapter, a new air cleaner, and some minor throttle linkage changes. Also, the 66 200 was usually delivered with a vacuum advance distributor that was paired with the autolite 1100 carb. This distributor will not work properly with the 5200. Therefore, you will need to change to the 68 - 73 dual advance distributor. This dizzy will work with any of the popular carb conversions including the Offy triple. If you elect to go electronic (recommended), you can install a Pertronix Ignitor I or II with a Flame Thrower coil at a later date.
As for the carbs you are looking at, Carb #1 on ebay is not complete. Not a good buy at any price given you can get a rebuilt unit with guarantee and customer support from Stovebolt for $65.
Carb #2. This unit has a electric choke. While desirable this would not cause me to move away from a Stovebolt carb.
Another benefit of using a Stovebolt unit is that they have a good deal of experience with the 200ci engine vis-a-vis jetting. As a result, you have a better chance of getting a carb already set up for the 200.
Enjoy - Steve
