Pat, Ive got three racks of spares that Im going to smoke tomorrow. I trimmed them, took off the membrane and rubbed. They are in the fridge getting ready for the smoker tomorrow.
Im going to put them on the wsm for 3 hours at 250 +/-, foil for an hour with some sort of liquid, honey, sugar, butter glaze then cook unwrapped for an hour. It will be my first try cooking them like this, not even sure exactly what Ill do.
I would try a most of the racks like you have done them before but take one and experiment with... good luck, let us know how they turn out!