Looks like this race at the November 7 1964 NSSC Coppertone meeting. By this time Dawson & Riley were racing their single-seaters.
Milan, great for the entry list thanks .. from what I have read the Jennings Fiat was an interesting car, an old Topolino body with a big engine?? does that seem right ?? and the Humber Ford, before the Jag motor went in .. brilliant !!