If you are going to use the Carter YH carbs, you may find this tech page usefull unless you are already familiar with them. I believe it was written by Bob Helt, who is as knowledgable a Corvair and Corvair carb expert as you can find. As you may know the YH was used on the Corvair Spyder and Corsa Turbos from '62 to '66 and so parts and info is readily available from Corvair vendors and forums.
I am in the process of restoring a '65 Corsa 180 Turbo and will need to get back up to speed on the YH myself. There are two problems that most of the guys have with this carb that you can deal with while you are putting everything together. The accelerator pump housing, down inside the bowl is often warped and needs to be sanded or machined flat. The same with the bowl cover. Most guys set the float level about 1/8" lower to keep them from flooding over from heat soak and causing hard restarts.
The guys that report the least amount of troubles, use a small electric fuel pump and a Good pressure regulator, set at 3psi. The stock pump has too much pressure and a cheap regulator won't supply enough fuel at 6000rpm.
Carter YH You may already know more about this carb than I ever will, but the Corvair guys are often also old truck guys and willing to help if needed.
