I believe that HH in the wheel box of this form is the code for 1967 Pontiac 14x6 steel wheels with disc brakes. source PAH publishing 1964-72 Pontiac Muscle car book.


also

I think TQ in the wheel cover box may mean

9714055 deluxe 14 1/4 " 26 holes , no spinner, 1967 Firebird


because Gary Plowman's 1967 Body broadcast copy

has a TQ. He has the 554 custom trim option that comes standard with deluxe wheel discs. He doesnt have any other options on billing history that indicate extra cost wheel discs, so I think TQ is the deluxe.