Hi Svenn
First I don't know why yours would change from one size to another going through the pump none of mine change size the are all 5/16 though I will confirm the size.
Now for more pictures of the routing of the lines take a look at
http://canadianmilitarypattern.com/H...INE%20WORK.htm which as a lot of shots of the engine work and close ups of the fuel, vacuum advance, and PCV tubes and the routing. Remember any photo in a blue frame has a high resolution version of the photo linked just click on the image.
You will note that the many photos of the HUP are of the uncleaned engine, I took these as the majority of the tubing and routing was original so I took these photos to document how things ran.
Let me know if these don't solve your questions, I've got more photos.