There is a snag to the Registry you've been directed to. There is nothing to indicate status of the car at time of posting. The listing could be for a top condition automobile down to something found in a junkyard during the 1980's or earlier. Also, some cars may have changed hands since the posting but the new owner (or one of the subsequent owners where applicabler) never updated the item.
You may have noticed two tags at various locations on your car. The Door Post Frame Serial Number tag tells you how many cars of type (I am assuming you have a standard rather than a Manhattan) were built before your car started down the assembly line. There is also a tag on the firewall of the engine compartment with various letters (like DR, AG, RA, SPEC-FO, etc); some of these have numbers by them. If you will please post the headers and the numbers at the headers (many of the headers have no number) I can "translate" the information into paint color, interior trim, and so on including options that were factory installed.
There are a cople of .pdf files that have information on your car in general.
I also recommend you get the blue cover 1947-1949 Kaiser-Frazer Shop Manual for your car as well as the 1948 Ilustrated Parts List as service aids. the 1948 issued Green cover Shop Manual does not have updates to service procedures that the Blue Cover book has
