Pull onto 'main street' in that same '67 today & it WILL get noticed.
These days, cars are all belly-button copies. There are no significant design element differences for many Post 2K year model vehicles. On top of that, people will 'purchase' high end models knowing they won't be paying for it all because they have no intention to. They just want to enjoy the 'now' & most things are disposable. It will only get worse w/the EV push.
A co-worker just showed be 'mommas' new ride (a '24 Ford Explorer). They traded in an earlier Ford Explorer for a '22 CC 1/2 ton truck years ago & now traded that truck toward the new Explorer. Since just '22, he's spent $30k in payments & still has 5 more years @ $900mo which is ironically now saving (?) him $300mo (because of a lower payment for more years). I bought my '99 CC SWB 3/4 ton Chevy truck around that time he got that 1st Explorer for her @ <10% of what he's spent so far & put about that 10% into it (maintenance, tires, suspension rebuild, wheels). I don't have to worry about a $900mo payment for the next 5yrs either. It's all about perspective. She's driving something fancy & new to get her here & there. I'm driving something old & def not as pretty that will still get me here & there for a lot less $$ even though it pales in comparison on fuel efficiency. I'll take poor mpg's vs efficiency in an older 'hey man.... that's a cool truck' world.
With that extra $$ not spent on something 'status symbol' new, I bought & mechanically restored a 1930 Model -A & my '78 Malibu.
The modern stuff is only more efficent if you granny drive them. Gas saving measures, even mode4n ones only work during part throttle crusing, wide angle throttle openings will always guzzle gas. Also most modern cars are overwright pigs compared to many older cars.