Power brake booster
I used brackets from a 74 Dart on my 65 Dart, so the firewall bolt-up and pedal attachments are the same, so if 75 is the same it "should work". I didn't use the booster & MC, though they would have fit. Instead I used ones from a 95-99 Breeze (see my avatar), which fit after slight filing of the bracket holes. The booster just barely clears the Wiend valve cover on my small block, but works. More room if the factory valve covers.