Bar-b-q: golden chicken

1 chicken, (3 lb)
1 orange
1/3 c white wine vinegar
1/4 c vegetable oil
1 tb fresh thyme, chopped
1/4 ts black peppercorns

1. With kitchen scissors, cut along each side of chicken`s backbone; remove backbone and trim visible fat.
2. Tuck wing tips behind back; flatten to 1 layer. Place in shallow casserole.
3. Grate orange rind and squeeze out juice; mix with vinegar, oil, thyme and pepper. Pour over chicken; cover and marinate in refrigerator, turning often, for at least 4 hours or up to 24 hours.
4. Reserving marinade, place chicken, skin side down, on greased grill over medium-low indirect heat. Add soaked wood chips. Cover and cook for 1 hour, turning and basting with marinade halfway through.
5. Transfer to direct heat; cook for 10 minutes per side or until meat thermometer inserted in thigh registers 185 F or 85 C.
6. Remove to platter and tent with foil; let stand for 10 minutes before cutting into quarters.