Need help on a couple random vacuum lines.

[srfjay]

Hey guys. Quick question. Picked up a 1970 that has been sitting since the 90s. And trying to figure out a couple of vacuum lines.
This one pictured . It is a little 3 way port. One to the oil dipstick one going to a hardline. (I assume to the gas tank) and a long hose going no where. I think this should be going to the stock carbs correct? And I am guessing this is smog related? Thanks

20220326_185530.jpg

[Habitat.pat]

Check out the parts diagrams, they show that plumbing. One to fuel tank, one to crankcase & one to air filter.

Peace,
Pat

[srfjay]

Ok thanks for the clarification.

[spl310]

It is part of the evaporative emissions system that was on some of the 1970 cars. Very few still have it all intact. Most have been desmogged