K-H brake swap done, but doesnt stop!

Thanks man!
I have a 1970 Duster with the factory manual kelsey-hays 4 piston calipers and they do stick acasionaly every spring I would pull them off to make sure there free . on another note these are not the best performing brakes when pushed and properly adjusted drums have a better feel for every day driving. Now I am contemplating stepping up to Willwoods since bracket race the car more than street drive the car and slowing the car down from 115 mph takes quite a bit of effort