I was checking out the latest Summit Catalog and they now have quick disconnect fittings in there. They are AN fitting and will fit pretty much any size of AN line you want (-4 to -10). They look really nice and are said to create a leak free seal. They are kind of expensive. $25/fitting. And you have to buy the male and female fitting. This might be something to check out if you are constantly removing fuel lines or something like that.

 

Keep looking, in the world of AN fittings and lines, 25 bucks isn't that bad. You can have 4-5 thousand dollars wraped up in fittings and lines real quick, when building project cars.

 

I've done looking and buying before with AN fittings. But the fact that you have to buy two fittings at $25/piece versus only one at $10/piece to acheive that same goal is what I was getting at.