Another Strange Air Cleaner on 66

[ray_mcavoy]

Originally Posted by Metalaroundstone

My carburetor has no ID on it except " Rochester" and "4 Jet." It is helpful to know it is a 4GC. I do not see any place to attach the hose on automatic choke mechanism. The only choke outlet attaches to a copper tube that goes to the exhaust manafold.

The ID number was originally stamped on a small brass tag attached to one of the air horn screws so it's pretty common for that to be missing off the carburetor.

Sounds like the PO also swapped on a passenger car exhaust manifold with the heat tube inside ... that's a good thing in your case because the truck manifolds didn't have that tube due them using a hand choke.

Anyway, the copper tube you mentioned is most likely attached to the upper end of that tube that runs inside the exhaust manifold. And the lower end of that tube is probably just left open (allowing the choke system to suck in unfiltered air). Just locate the opening on the bottom part of the manifold and run another section of copper (or steel) tubing from there up to that rubber hose on the carb air horn. That will give the choke system a filtered air supply.