Tonight I installed the fuel vent line to check for fit. I flared the line, installed the ferrule and nut, and temporarily installed both end ribs and the inboard fitting to get the line in its final position. The end of the vent line is within about 3/8" of the outboard end rib web. I'd like to see it a little closer, but I don't think it would be worth remaking the line. Besides, with the current fit, I won't have to pull it out as far to make room for making the sealant fillet on the outboard end rib.
I also wound the outboard sender plate wire around the vent line by spinning the snap bushings. After I was satified with the wraps, I trimmed both wires to length and installed terminals at the inboard sender end. I unwrapped the outboard wire from the vent line in the inboard sender's bay to get enough slack in that wire, then unclecoed the inboard end rib and moved it as far as I could outboard to get slack in the inboard wire.
Next session will be to check continuity, then screw and seal the wires in place while the inboard sender plate is loose in the tank and there's slack in the wires. Then I'll final install the plate, and take the slack out of the wires by spinning the snap bushings again.
Outboard end of left fuel tank vent line.
Sender plate wires trimmed to length; enough slack for stripping and installation of the terminals.
Both sender wires with terminals installed and pulled back to near their final position.