The vacuum system works good. Good brake and locks work fine. One thing that bugged me is that it took what seems like a long time for the engine to stop after the key is turned off. About two to three seconds. It shakes bad during this time.
I pulled a vacuum reservoir tank off a gasser and installed it and a check valve as close to the vacuum switch on the ignition as possible. The engine now stops nearly instantly. About a half of a second. Much nicer.
How long should it take to shut down?
Am I compensating for another problem or have I made a design improvement?