Here are my notes from a class with Susana from 2004. "Lead with the chest. Extreme straight and leaning posture. Somewhat wider stance than I’d been taught. Should be room between feet, while woman’s feet are together."
BTW, no one I've ever taken lessons from has ever described dancing apilado as "shoving the lady around with one's chest." Nor have I ever heard anyone who has had lessons in a style that features weight sharing (force sharing? maybe not) to create a shared axis talk about it that way.