The float with the longer depth adjustment tab is a later design with the float pin hole repositioned several thousandths to give additional buoyancy on the newer carbs.
Each float carries its own part number, and Rochester does NOT state the later superseded the earlier. They also do not say it doesn't. But part material lists for the carburetors using the earlier float printed AFTER the introduction of the later float still show the original part number.
Are there any issues? I do not know.
Jon
