If I had to describe the problem with human references I would say that Windy feels like she is gasping for air when she bucks. Just like you said, running with your fingers up your nose.
I have so many things to try now I may never be able to do them all. Especially the tranny rebuild. I could not rule that out as a problem though. Tranny shudder at low RPM's has always been an issue with this vehicle.