'71 air cleaner & manifold help

[bozly]

I am new to older vehicles and looking for a bit of guidance. I was lucky enough to pick up my grandpa's 1971 C10 with 350/350 combo.

Goal: install headers and have a shop fab up a dual exhaust system.

Problem: I am unsure of 2 items that are coming off the air cleaner and believe they will give me a problem when in install headers. So, I am looking for help identifiying them and finding a work around.

Yellow arrow: what is this yellow tube that runs from the air cleaner to the exhaust manifold. How does this come into play when installing aftermarket headers?

Green arrow: looks like a vacuum line that runs from the air cleaner to the side of the carb. If i need a new air cleaner to fix the above green arrow issue how does this vacuum line come into play with the carb?

Any help or suggestions is greatly appreciated.