Place sirloins in spice and press for 12 days. Remove from spice and rinse in cold water, then let sit in clean cold water for 2 1/2 hours. Remove and let dry in refrigerator overnight. Light smoke for 14 hours at 135ºF. Rub in salt and white pepper mix, wrap in cheesecloth and hang at room temperature for 24 hours. Then hang in walkin for 20 days.