RELATED: Full coverage of RCR '3' announcement CONCORD, N.C. -- Team owner Richard Childress made it official Wednesday, announcing that grandson Austin Dillon will field the No. 3 Chevrolet for Richard Childress Racing in the NASCAR Sprint Cup Series for 2014.   Childress hasn’t fielded the No. 3 car on one of his Cup entries since the 2001 Daytona 500, the final race for seven-time Cup champion Dale Earnhardt.   Dillon, 23, is the defending NASCAR Nationwide Series champion and a former Camping World Truck Series champion.   "It’s a huge responsibility," Dillon said Wednesday at Charlotte Motor Speedway. "Everybody knows who made this number famous. With my grandfather and his friendship, they were able to build something great that will never be touched.   "But we feel like bringing it back with my grandfather and RCR … it’s going to be special. We’ve put in a lot of hard work and effort at the shop and we’re prepared for everything that’s to come." From the very beginning of his racing career, @AustinDillon3 has been behind the wheel of the No. 3. #TBT pic.twitter.com/4XpZ0zt7iA— Cheer The 3 (@CheerThe3) December 12, 2013