Combine all Spicy Pickles ingredients in a container. Stir until combined and cover. Refrigerate for 24 hours to allow the flavors to combine.
Trim all hard fat from the pork shoulder and inject with Smoke on Wheels Pork Marinade and Injection. Rub the shoulder with Cattleman's Grill 8 Second Ride Carne Asada Seasoning and let it sit in the refrigerator for a few hours to let the rub re-hydrate and adhere to the pork shoulder.
Preheat your Yoder Smokers YS640 (or other cooker) set up in direct grilling mode to 250°. Place the pork shoulder directly on the grate and cook until the desired color is achieved (150° to 160°). Next, wrap well in foil (use two layers to seal in juices and keep meat from steaming) and cook until internal temp is 200° to 205° (use the Maverick PT-75 thermometer for fast and accurate temperature readings).