The Jesus Trip (1971)

When the police discover that their motorcycles are concealing heroin, Waco (Robert Porter) and his motorcycle gang hide out in a desert convent. A highway patrolman (Billy 'Green' Bush) hunts down the gang after they kidnap a nun, Sister Anna (Tippy Walker) and flee the convent. Soon Waco and the young nun fall in love and she is forced to decide whether or not to leave the Church for him.