How much "shake" at idle is acceptable?

jcolman said
It runs quite well when warm. But I don't think it should be shaking like this when I first start it up. Actually, there are times when I'll notice some engine shake after it's warmed up but not like this.

Then you probably don't have a vacuum leak, spark, timing, or mechanical issue. Heck even my old Holley Pro Jection 4 had a adjustment to richen up the choke for cold start. There's a reason why carburetor chokes have thermostats that open the choke slowly. Cold start engines don't go from choke to full lean immediately.