Place pig on a large baking sheet with a V-rack or turkey rack and roast for 2 to 2½ hours, basting pig with pan juices every half-hour, until the internal temperature reaches 160 degrees.

If not using the optional orange juice, arrange the pig in a large roasting pan on all fours, and roast for approximately 3 hours, or until a meat thermometer inserted in the thigh reads 160 degrees.