OK,
The good news, the Weber 32/36 and the Holley 5200 (or Holley-Weber) are the same carb. The 5200 was used on a number of Fords as well as Chevrolet and Chrysler products. The early 1970's pre-electronic mixture control carbs are best. A number of people who have made this change purchased their 5200 from Stovebolt (
www.stoveboltengineco.com). They sell a rebuilt 5200 for $65. I have one, very happy with it. As important, Tom (owner) is a excellent resource if you have questions about installation or tuning. Best way to accomplish this conversion is with an adapter. You can use a generic version, available from Stovebolt and others, or the Clifford Performance adapter. I strongly recommend the Clifford unit for a number of reasons, not the least of which is the fact that it was designed to be used for this specific application. See the Holley Weber Tech article in the tech section of this sight for a good overview.
The issues. You will have to come up with a linkage solution. As I am not familiar with the stock Comet so I can't make a recomendation, however, the Mustang was not hard to fab. Bigger issue, the early 170 engine used a vac advance only distributor, the Load-o-matic, that is tied to the stock Holley / Autolite carbs via a spark control valve in the side of the carb. This value controls the vac applied to the advance diaphram on the dizzy so as to advance and/or retard the timing based on engine load. The Holley-Weber carb will not support this dizzy. The solution is to change to a dual advance unit (1968-1973), or the DuraSpark. Unfortunately, the distributor drive hole in the pre 1964 engine is to small for the later dizzy. I do not know of a solution for this problem. If the Load-o-matic will run off of "ported" or "manifold" vac alone you could go that route. Before I spent the money on the carb and adapter I would try running the car with a direct ported, and a direct manifold source and see if it will work for you. If not, you need to stay with what you have, or upgrade to a 200 I6 autolite, which has the spark control feature ( this dizzy carb combo was used thru 1967).
Hope this is helpful - Steve
