If we ever get our laptop fixed, I'll get some pics for ya. I put the filler neck at the back of the pass. valve cover, and made a custom vac. tube to the intake from some steel tube and rubber hose. If you decide on these and get ready to drill / cut the hole in with a hole saw, be sure to use a size that's 'too small'. My cousin did his with the exact size of the rubber grommet, and his fill tube pops out. I used the size below and my fill tube has a really good press fit.
Scott