Can someone please explain the difference between a Detroit Locker and a Detroit EZ-locker. I am new to this and I have no idea about the differences between the two. Which one is better. I know that the Detroit Locker costs about twice as much at the EZ-locker but is it worth the extra money. Also, how can I tell if my axles already have a locker in them or not. I have a '74 K5 with a 12-Bolt in the rear and a Dana 44 up front. Any input will be much apprecitated.