Changing to BBP on the front??

73-76 sway bar and 69 k-frame don't mix too well. you need to modify it if you want it to work. for a 69 style sway bar, just mount the spindles(they are symmetrical) so the calipers are at the back(make sure bleeders point at 12 oclock), then you can use an original mounting style sway bar for a 69.