Wilwood rear disk brakes?

Tonight I jacked up the rear of the car to see if it was actually holding the brakes on. Before i touched any thing I turned the rear wheels with the tranny in neutral No resistance except for the driveline. Pushed the brake pedal once and tried again, same thing, no binding. So I pumped the pedal quite a few times the turned the wheels hmmm no binding. So I'm going to assume that it has the right master in it. That's the good news.
I tried to turn the wheels backwards and that's when it's hard to turn.
I do have a spool in the rear but I would figure it would turn the same both ways. It could be the tranny dragging the one band. I saw this in the tranny I had in my Charger. With the pan and vb out you could turn it one way and it was fine, turn it the other and you could watch the band shift crooked and bind on the drum.
I also pulled the front wheel off just for a look see. Hmm odd. the calipers are held on with 2 retaining plates on top of the caliper instead of riding on bolts screwed into the back. Is this a stock setup? I'll have to look into this. The fronts do drag more than I would like, But that's just the piston holding it like that.