All Stop, Matey ! I couldn't find the box with the leftover piece - naturally - so I put on some pants and drove to Autozone. This is what you want. Remember to warm up the line, and you will need to trim ca. 1/4" off to leave a little space for the center of the barb. I didn't bother putting a...

I'm getting ready to do this as well. I just bought every one that was listed through FCP or IPD. I think there were only three but I do know that in my case one was no longer available. I figure if I'm doing it, then might as well do all of them including the filler neck doughnut.

Replace as many of those lines as you can while you're in there. I think @Abscate has some pictures of one of the tanks recently that he dropped. Check your fuel filler neck clamp about half way down it (can't remember if yours has this) the clamp rusts away over time and gives you large PCV leaks d...

Here's a whole bunch of info from guys who have done this https://www.matthewsvolvosite.com/?s=drop+tank