How much "shake" at idle is acceptable?

jcolman said
The engine was quite cold. It was winter. No carb….Holley sniper. I was demonstrating how well the sniper handles cold starts

Starts right up because it's FI. Heck my wifes new Buick doesn't run perfectly smooth the first few min. They are set to run lean. If your FI program allows it, richen it up during the warm up period. (as long as it runs ok when it is warm.