its the laws of "Gravity'...thats why your alcchol mounted front fuel cells that feed a mechanical pump must be mounted a little rhigher then the fuel pump so it will naturally fedd the fuel pump..
we were speaking in other thread about SPIB installing a manual shut off valve at the tank...if your fuel cell is higher then your carb it would be a great idea for you to place the cut off valve at the tank....you DO NOT see this much with a rear mounted fuel cell..
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "