Here's a video of Huo branch's Liu Da Kai, and Ba Da Zhou

http://www.youtube.com/watch?v=fnzOCpac7tI

Jin Gang Ba Shi is the same basic idea (doing different "roads" back and forth).

I learned jing gang ba shi, some of liu da kai, and xiao baji quan a few years ago but don't really remember much myself, and didn't go past an extreme novice level in the art (stuck pretty much to taiji quan). Jin gang ba shi did have some very "pigua-esque" technique in it. One technique I remember is starting with a pigua type arm swinging attack, getting inside, and then putting the shoulder and hip into the opponent along with coming across with the front arm (pulling down with the back) for a take down. Think "parting the horses mane" from taiji quan but from a side horse stance.