If your going to re-plumb the the lines, go to a two-line system. On a Sky Raider Mk I (or II), you don't need a 3-line system. Always try to run as few lines to/from the fuel tank as possible - the more lines, the higher the probability for additional issues.

If you have a fully cowled engine that's a different situation, but even then a lot of times the lines area accessible and only 2 lines are necessary.

Hogflyer