You found enough to indicate that this was one of the original dealer sampling cars (sampling at least 1 per dealer) produced by Kaiser-Frazer. Estimated build date is somewhere around September 30, 1946. As serial numbers start at 1001, this is the 2,840th Kaiser automobile to roll off the production line (body numbers will not normally match serial numbers).
Now for perhaps bigger questions. First, does the car have the word "Special" in script on the trunk between the K A I S E R lettering and the punch for the license plate? Second, does the exhaust manifold attach to the exhaust pipe up by the radiator or directly below the carb/air cleaner? Third, is the word "Special" in script on the sill plates and is the word KAISER on the hub caps?
Jack Mueller