I am finally seeing the light at the end of the tanks! I routed the fuel level sender wires in the feft tank and installed the vent tube, then cleaned the end ribs, skin and fittings. Using sealant the vent line fittings and fuel level coupler were attached to each inside rib. Then thes inside ribs were clecoed with sealant to the skins. The terminating end of the fuel vent tubes were then bent to nearly touch the top skin. Then the outside ribs were clecoed in place with sealant.