Add HALF of the seasoning. Seal, and toss to coat. Refrigerate overnight.
Fire up your Vortex with a full load of coals. Let them ash over before cooking.
Combine the remaining seasoning with the pepper and flour.
Roll chicken in the flour mixture and coat well.
Place the chicken on the grill grate around the Vortex.
Close the lid (leaving the top vent open) and cook for 45 minutes or until the chicken reaches 165 F. You may turn the lid 90 degrees every 15 minutes of cooking if desired.
Lightly brush the tops of the chicken pieces with oil and cook another 5 minutes to crisp the skin.