Dream 67 440 gt dart

Sorry for this but I dont think the 74 B body brake parts will work. Maybe someone else will know better than I.

For certain what will work are the spindles adapters and upper control arm from a 73-76 A body. Those pieces from the 74 are good swap meet fodder though. You can use the B caliper adapters on A body spindles, those are good parts to reuse, giving you the better pin type caliper vs the sliders which were stock on A's, the calipers might work as well, you'd need to mock it up with the correct spindles on the car to make sure, main thing would be the brake hose routing. Pin type calipers came with different hose attachment points depending on the year and model.