If you are asking for help diagnosing your Corvair issue you need to post full information about your car in order to get the best responses. We really need to know the year and body style, what engine (80, 84, 95, 98, 102, 110, 140), what transmission, what ignition system, and any other non-stock related items as well as a good description of your issue. All Corvairs are not the same. All engines do not have use the same settings. For drivability issues it is good to know if the distributor is correct for the installed engine (distributors vary widely based on application). Engines get swapped over the years, do not assume that just because you car is a 65 that the 2 carb engine in it is a 65. Check the numbers on the block and heads and verify what it is. If you do not know where to look or tell what you have, ask.
As complete a description of the issue as possible is of course helpful. Tell us exactly when the issue occurs along with any associated noises and any testing with results that have been done to try to isolate the issue.
I and many of us are glad to try to help, but, if you give us all the data up front we can do so better and more efficiently.
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
Currently working full time repairing Corvairs and restoring old cars.
Located in Snellville, Georgia