Big straight shoulder, long hind legs, upright neck, small hips... That is about allI know about "big lick" TWH conformation...
According to the TWHBEA, reg. Conformation "
Tennessee Walking Horses generally range from 14.3 to 17 hands and weigh 900 to 1200 pounds.
The modern Tennessee Walking Horse possesses a definitive head with small, well placed ears.
The horse has a long sloping shoulder, a long sloping hip, a fairly short back and short, strong coupling.
The bottom line is longer than the top line, allowing for a long stride."
Here is a link to the past World Grand Champions. You can kind of watch the progress of the "big-lick" movement by watching the ones that have videos. I noticed in a couple of the pictures, the ones' that were padded even have the pads on in the drawn picturse.