Looks like correct-style air cleaner/snorkel for a '65 'Bird/Galaxie. To be more-precise, the color used on air cleaners and valve covers of '65 Z-code 390-300 hp engines is Gold Bronze, which was used as early as 1958 on Mercury 383s and on hipo 352-390s of '60-'64 vintage. Too many people paint them a really bright gold color a'la Oldsmobile V8s. The gold-bronze color, I think, was also used on the higher-hp 289s of '64-'65. Intake, heads, block, front cover, oil pan and numerous accessory items like oil filler cap, starter, fan, pulleys and brackets were black, while there's a bunch of items that were not painted like the alternator, carb-to-intake spacer, fan clutch. If you have a non-AC car with a top-mounted power steering reservoir/Eaton pump it's argent silver, while cars with AC that had the Ford/Thompson-style pump had black-painted reservoirs/covers and silver cad filler cap.
If you're really looking for a more in-depth description of finishes and components, including casting/part numbers, in a '64-'66 T-bird's engine bay you need to get ahold of Vintage Thunderbird Club International's (VTCI) 1964-1966 Original Factory Specifications (OFS) manual, available for sale to members of VTCI. Go to
www.vintagethunderbirdclub.net and find the pull-down menu for Country Store/Buy Concours Rules along with checking out the VTCI Forum's 1964-1966 Thunderbirds section. This will also have interior, trunk, undercarriage and other interesting/useful information if you're looking to restore or maintain the car.
Full disclosure: I've been involved in developing VTCI's OFS manuals since the 1990s and their current Technical Director.