Oops, yes as Arctictraveller said you do need that. It is a quick job with and only with
that! And I have done it on the side of the road, and once in the road (luckily it was a seldom traveled gravel road). It's a long story, but here's the short version. My Quigley modified tank was rusty as was my rear transferflow. I had other issues with the engine (vaccuum related) soon after I bought it and went through a time where I thought hesitation and other troubles were clogged fuel filters, so I kept changing them thinking that was the problem. I've gotten pretty quick at it. The fix for me was to replace what I could of the fuel tank venting system and don't overfill the tank.
Here's the set I got which has come in very handy so far on several van repairs. They are plastic but are holding up well.
http://www.amazon.com/Lisle-37000-Condi ... B0002SRCK6