My K Convertible had a scheduled build date in LATE July, 1965........would it have come from the factory with the single or double hump air cleaner? what color base?
Your car would have had the regular hi-po lid with a gold base. Although, there is a lot of confusion about the base color, some may say black, some may say blue. The best answer is gold, though, unless supporting documentation is found to disprove.
The double-hump lids were more typical for 64.5 K codes and early '65 alternator production K codes.