The hose attached to the front of crank case

[CJHenderson]

The hose attached to the front of crank case, where does it connect to?

[BHap]

I think that tube comes from the plastic fuel evaporation tank in the trunk which vents the fuel tank.  Directs fuel vapor from the gas tank back into the engine - so part of the emissions control.  This setup started in 1970 and replaced the "atmospheric" venting setup in earlier cars.

[CJHenderson]

Thank you for your reply, your advice helped me greatly.