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It looks like you've got the locating pin solved--and being that the carb came from a B18 it should be fairly close as far as jetting goes. To get the Weber operating properly be sure to connect the manifold water pipe. There are a number of ways to plumb it, but do get hot water to the manifold. The electric choke Weber has two problems--it comes off choke too quickly in cold climates--you may not have that problem in Atlanta--I solve that by putting an old Chrysler type resistor in line to the choke cutting the voltage to 8-9v. The other problem is that it cools down too quickly--go into the grocery store and come out 15 minutes later and it wants to apply the choke. A copper hot water pipe next to the choke can help. Some Ford Pintos had a Holley/Weber with both electric and hot water to the choke--the best solution short of a choke cable. Put together a filter housing that will let you channel warm air from around the exhaust manifold to the intake. After getting the whole thing set up, drive it and take note of all aspects--cold starting, transition to hot, idle, performance on the road etc. If you must make changes to the jetting go from rich to lean. Lean running will be more apparent than rich running when you get to the "gone one step too far" stage. I do agree with all the other writers that SU's work best and that's what I have on my '69. One other thing--as someone else mentioned--International Auto Parts would be a good place for you to source Weber parts. Jets and such are interchangeable.
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