I changed the gasket and exposed the "other" hole in the bottom of the carb and the squeal is gone.
I had 2 different gaskets each with notches in different places. There are 2 small holes int he mounting flange. THe new gasket seems to have remedied the squeal.
Now I am on to my timing and new hesitation issues
BTW Holley was little help. The only rebuild these they done't know about their application. Their suggestion was to return it for another one.
