Thank you, what problems will the 340 block and bowl on a 440 center cause? I set the float level at the bottom of the window with sight glass per Tom's instructions, I think Dayclona's call for halfway up the glass. It isn't loading up and I cant tell that I am getting bleed over in the carb.

Any suggestion on the surge other than going to 66s?

Another question, should the secondaries hold vacuum when pulled in the port? It activates but doesn't hold, the pods will hold if I have them in my hand and push the diaphram in and hold my finger over the hole. When I have it mounted to the carb it doesn't hold and I hear it bleeding off inside. I double checked a 440 set up I have and it is the same. AND they definitely seem to be fully engaging when I am on it.