Question about fuel lines...

[badmix]

While I messing with my Rock Slider Braces. I was near the back, just ahead of the rear wheel. Up where the fuel lines are on the rail, there are 4 lines. 3 of them have short RUBBER pieces, they are only about 2-3" long. The rubber looks pretty worn and Ill probably replace them, but just wondering what all those lines do. Why 4 of them? And the ones with the rubber, do they have fuel going thru them? Meaning do I need to be extra cautious when replacing these rubber lines.

This is 1984 K5 Carb'd

 

[76zimmer]

regular fuel rated hose will be fine.
Fuel supply, fuel vapor to charcoal cannister, fuel return, fuel vent?

 

[texas4x4rebel]

One line that runs through that area is the rear break but it doesn't have the rubber hose.

 

[badmix]

Yea one doesnt have any rubber , I thought the brake lines ran down drivers side. Ill have to look.

Also does anyone know where to get some ethanol-quality lines.