Chris,
The secret to any coach repair is to first diagnose the cause. If you know the cause, it is always easier and cheaper to repair the problem than it is to through parts at it in the hopes that you hit the problem.
To locate your problem, you need to determine the cause of the dragging (overheated) brake. First, never assume that just because a part is new, that it is not the cause. To determine the reason for the dragging brake, you need to narrow the problem down to mechanical or hydraulic. If you can jack the wheel up and apply the brake and it does not fully release when you release the brake pedal, it will be easy. If not you will need to duplicate the condition to properly diagnose it. If the brake is dragging, open the bleeder, and if pressure is released and the dragging stops, your problem is hydraulic. If there is no pressure the problem is mechanical from resistance in the caliper slides, internal caliper resistance, or a binding in the caliper mounting caused by a bent or misaligned mounting part. If your problem is hydraulic and it can be duplicated, just start venting the pressure back up the circuit until you locate the source. It might be in one of the parts that you have replaced or in the ABS valve block, but locate the problem and repeat the condition to be certain before replacing any parts.
Gerald