Well, don't I feel like a jackass. In all honesty man, I have trained or trained with lots of athletes over the years, and only haven limited experience with one little person. He's just a kid (18-19) and squats a ton (like 500 the first time he ever tried a parallel box squat).
I know that the typical strength numbers we use to see whether a guy is ready or not for the leap won't hold for your bodystyle. What I would do is couple things...
1) Post your training split, weights and reps used, and goals (be it for strength, size, both) - make sure to note when you are using a shirt or suit. Also, for squats, not whether you are squatting ass to ankles, on a parallel box, etc. And for deadlifts, whether you are pulling sumo or conventional.
2) I would try to hunt down Markus Schick as well as some other guys with your same body type in powerlifting. Serveral are very successful and will be able to give you some tips, if nothing else.
I'll give any input I can when I see your training split.
Matt