You'll find a few 727s with NLG brakes these days. (Probably more correct to say you'll only find a few 727s these days.) But even in it's heyday, most 727s didn't have NLG brakes. Since you had to be more than 50% into the brakes before the NLG brakes kicked in they didn't see that much use. Plus they added dead weight that the airlines looked at as an extra passenger. So most airlines didn't order them or removed them and put the snubber strips in. You could tell when the snubbers were worn down because you'd hear the wheel spinning down under your seat after retraction.
In 13 years flying 13 dash numbers I never flew one with NLG brakes installed. Now I run across one every once in a while in a VIP configuration with the nose brakes because they have W&B issues and tend to carry them as ballast.