NORMAN, Okla. — Josh Heupel delivered high fives and hugs as he left Owen Field. When he reached the visiting team’s tunnel in the corner of the end zone, he went to the wall where Tennessee fans were reaching for their head football coach. He slapped more hands, jumping to reach the last one just before he entered the shadows. As Heupel continued toward the Tennessee locker room, his father, Ken Heupel, stepped in his path. The father and son slapped chests, then shared a few words and a hug that neither seemed to want to walk away from. After a few pats on the back, he went to celebrate with…