'70 Dart--Suggestions for front brake changeover

Any73-76 A-body or 76-up F-body/M-body stuff will work. You'd need the spindles, caliper brackets, calipers, rotors, hoses (to match up with new ones) and, if possible, the master cylinder and proportioning valve.
If you have the drum brakes properly set up and adjusted, they should work just fine as is.
jus sayin....