Place half the ribs in single layer on center of large sheet of heavy-duty foil.
Mix sugar and seasonings; rub half evenly onto both sides of ribs. Bring up foil sides. Double fold top and one end to seal packet.
Add 1/4 cup orange juice to packet through open end. Double fold remaining end, leaving room for heat to circulate inside. Repeat to make second packet.
Place packets on grate of grill; cover with lid. Grill 45 min. to 1 hour or until ribs are done.
Remove ribs from foil; discard foil.
Return ribs to grill; brush with combined barbecue sauce and bourbon. Grill 15 min., turning occasionally and brushing with remaining sauce.