friends 63 ranchero. dont know if its a 170 or a 200 yet. Carb on machine is 1bbl, with two widely spaced floats on a common shaft. A overhaul kit for that make/yr resulted in a kit which the schematic shows has one float in the more normal 1bbl manner. Any clew as to what it is? No particular brand name of numbered type tag thereon......mutt