Hi Eric,
My 1963 parts book is dated “Effective October 1962” in the front of the book. It does list “J/fire” for many of the parts so I have assumed it does cover Jetfire too. For the camshaft, it only lists a single part number for all “1961 thru 1963 F85” as 1164950.
In my parts book dated “Effective September 1961” it lists two different camshaft numbers; “1961 & 1962-F85 exc. Heavy Duty” 1164950 and “1961 & 1962-F85 Heavy Duty” 583043. I do not know what heavy duty means but it is before any Jetfire parts were listed.