1967 DART OWNERS..Brake question

Yeah I was standing in the Parts store with my fingers crossed. I live 1/2 hour away.

My local parts store had the one displayed a Year One. (actually had one in stock..small town in Manitoba, Canada!).

If you go to Summitt racing, enter 67 dart and they show both styles for that year of car.

Now I am wondering if 1 is for manual brakes drum. and the other for power brakes?

Thanks for your replys!!!!!!