There are two different length tubes, I've had the fuel tap off 3 times since I've owned the bike, and the last time was June of last year, I looked the inside of the tank over with a mirror and flashlight, so I know it isn't sitting in the tank somewhere.
The parts catalog isn't real clear on this .
How is the screen filter attached to the tap?
My fuel tap had some sort of red sealant around the intake tubes, no evidence that a srceen had been in there.
If memory serves my correct, Milkman has an LS, so it's at least an '82 model year bike.