That is clearly the 4 bbl accelerator cable bracket in the pictures. It's upside down in the photo but if you were to rotate it so the stud is pointing up it would turn toward the outside of the motor which is what you need for the wider 4 bbl carb. The 2 bbl bracket turns toward the centerline of the motor for the narrower 2 bbl carb.
I had to make that bracket for my car. If you don't need that one, PM me and I'll buy it from you.
