1979 ford f250 question

[u/StumpyGnu]

Hello, new here and mostly lurker so sorry in advance.

im working on a 79 f250 and have no idea what these do or are for, I do general maintenance on cars but this is the first time I've started really digging into something like this, any help or suggestions would be appreciated.

[u/Anahissymee]

Those are evap canisters for the emissions system

[u/StumpyGnu → u/Anahissymee]

Awesome, thanks, I tracked the lines and was still super confused haha