Thanks all for the responses. Sounds like a return line is in my future. I already have the electric fuel pump - anyone have diagrams/photos/parts lists of installations? The intake manifold is a Performer RPM air gap; shouldn't that pretty much mitigate the same problem the phenolic spacer is designed to solve?
p.s. I threw a gallon of our winter formula "gasoline" on the ground the other day and tossed a match in it. It just giggled at me! Does that mean winter formula gas is good for corn growers and tree-huggers, but painful for internal combustion junkies?
Terry