One video I saw of Tracey had her blowing some dude for a few minutes, then getting on top of said dude, who came 2 seconds after entering her pussy. Then the dude just laid there, obviously embarrassed, for a little bit. Tracey went to work on him, got a serviceable hard on out of him, and through her efforts they actually got through the scene. Never saw the dude in any porno after that, which is understandable. She was able to get the most hopeless of limp dicks to perform, as is evidenced in this scene with Cal Jammer, another well known limp dick.
I may have just answered my own question. I just saw another video of her obviously from her early career. She's considerably slimmer, and her boobs are smaller. As she gained weight over her career, her boobs may have grown as well.
I always thought she was natural. The best observation of that is between 7:50 and 8:10, where her boobs flatten out considerably while she's flat on her back. That's the best view of a woman to determine natural or enhanced. However, Boobpedia indicates she's enhanced. Any comments on that ???