Assuming one of the 6 bangers since you didnt say, goes to exhaust manifold
just about below the carb.

Whitelightning

the heat raiser tube goes to the exhaust manifold or it's shield.
the heat  opens the choke fully.
many carbed  vehicles get the old 'manual choke' after problems in this area.

This is/was a common problem and there is/was a repair kit to fix it.
Check with you local parts stores.  If the kit isn't available locally;
check JCWhitney(online).  The kit contains new Aluminum tubing that you
have to bend into the same configuration as the original and a fitting
that is installed in the exhaust manifold where the rusted/broken tube
originally terminated.

Dave S(Texas)

"John"  wrote:       ( '82 F-100   YFA-1-V Carb  )

On the air horn is a 'Hot Air Choke Inlet'.   The metal
line leading from it is rusted off.   Where does this
connect to the engine?   I can't locate the other end.
_____________________________________________

Assuming one of the 6 bangers since you didnt say,
goes to exhaust manifold just about below the carb.

Whitelightning
_____________________________________________

If it's a V8, it goes to the intake manifold just below
the carb, in the exhaust manifold crossover area.

Rodan.