The Holley 1920 was used on many different vehicles. Specifically, Chrysler Corp. used them on their Slant Six engine. One way to immediately identify a Chrysler application is by the air cleaner attachment. It is a heavy wire that runs across the throat of the carburetor with a stud sticking out of the top for the air cleaner to be "wing nutted" to it. Our carburetors have the same casting with the ability to use that wire. But ours used a clamp. My truck came with a suspect carburetor and it never ran right. Also, the jets were different numbers than what our Jeep used. (another clue)
Maybe you might want to advertise in the wanted section of this forum. There may be one out there that someone is parting out.