That tach, I pulled from a Argentine built Ford Falcon I found in a junk yard. In the back, it says Ford Motor Company, hecho en Argentina, and has a button so you can make it work on six or eight cylinder engines. I guess it is a dealer accessory sold back in the day. I only had to replace the wiring, and it worked like new. have it for many years.

My crazy brother in law just flew out to Sao Paulo yesterday. He had a kidney stone on Saturday that he could not pass. He filled up with medication and took off anyway... there are several people going down there from his church to visit some churches down in the city. How far are you from Sao Paulo?

When I first rebuilt the carburetor, I had the idle speed screw installed before installing the axle and butterflies, so I never checked to see if the butterflies were actually adjusted properly to the bores. They weren't.

What I'm doing now is letting the primary venturi assembly to soak in some carb cleaner for a few days (since Friday). All the air bleeds were clean, as were the idle jets, but I hope there were some of that 30 year old fossilized gasoline much like tar in the passages to the annular discharge venturis, and that is what is restricting the fuel flow. Really hope it will work, because if not, will park the car for some months until I have the cash to import from the U.S. a replacemente 1.08 Autolite, or a Holley 570 Street Avenger, like Charlie suggested.  Edelbroock carburetors are ready available at speed shops here, but I'm no fan of them, and my air cleaner from a 1966 Galaxie 500 7 Litre won't fit on top of it... And I had a lot of trouble getting that air cleaner, it's original, and not a modern replica. 

All Autolite/Motorcraft carburetors that were sold here in Brazil, came in 302 engines, like the ones on V8 Mavericks, and on 1976 and forward Galaxies. All of them had 48F jets. So, you can imagine that is very hard to find variety on Autolite jets, specially because they are different from Holley jets. Those are found with ease.