With the NASCAR Cup Series’ debut at Iowa Speedway taking place this this weekend, Kevin Harvick and his Harvick’s Happy Hour crew are locking in their predictions for Sunday’s race. First, Harvick believes Iowa Speedway will feature a return to form for Joe Gibbs Racing, after some engine troubles plagued the team over the last couple of weeks, with Denny Hamlin leading the charge on Father’s Day. “I think we’re back in the wheelhouse of the Gibbs cars. I think Denny Hamlin gets back on track,” Harvick revealed. “We would — Clint [Bowyer] was arguing with me in the booth over the Gibbs cars. …