Can someone explain how the chokes tubes are fitted together? It almost looks like it the tubes that connect to the carb and choke are threaded, but the other ends that go into the intake manifold are simply just seated in them. Here are the 3 parts if that helps with a visual....

https://www.ebay.com/itm/173884259559
https://www.ebay.com/itm/352937321249

Mine was rusted and the one tube broke off, so I wasn't sure how exactly they go together.

Thanks for your help.

 

Yes the tubes just push into the part the is bolted to the manifold. Your's probably rusted in and broke off so the tube end is stuck inside. Buy the 3 new parts and you are good to go.

 

The ? shaped piece threads onto the carburetor's choke housing. Its swaged end is a slip fit into the U shaped piece, which fits into the exhaust crossover passage in the intake manifold.

The long piece's L shaped end goes into the other port on the U shaped piece, and its J shaped end connects to a port at the back of the carb air horn using a short piece of rubber hose.

The QuadraJet choke coil housing has a plastic tube connecting it to a vacuum passage in the carb body.

The way this works is: engine running, vacuum draws outside air thru the choke tubes. Outside air source is from air horn, thru the choke heat stove in the intake manifold where it's heated, then the heated air goes across the choke thermostat coil causing it to expand and open the choke plate as engine warms up. The linkage on the choke rod also works the fast idle cam to allow engine speed to drop to normal curb idle speed as engine warms up.

The bolts holding the choke heat stove to the manifold are liable to be ornery. Maybe not quite as hateful on an aluminum manifold. Make sure to run a tap thru them before installing the new heat stove.

 

Exactly as described by rocketraider - here are a couple images which may assist.