1850 is a very common carb. We'll have no problem helping on that.
Not sure this is on track to helping with your problem. I think you posted that fuel did come out of the shooters. yes?
Side hung floats. Floats go parallel when the bowl is held upside down.
That's generally a good rule of thumb with Holley side hungs https://documents.holley.com/199r8339.pdf
