I just completed removing all of my cabinets that were original from 64, they were only hanging on the walls by 3 inch finishing nails, All I had to do was use a flat pry bar and a hammer to get behind them use a flat piece of wood about 6 inches or more to pry onto once cabinets are loose they pry them off, I also used a sawzall/hacksaw blade to cut nails between cabinets so i didnt destroy the old cabinets.