SuperVan (1977)

aka: Supervan

Clint Morgan (Mark Schneider) goes to The Invitational Freak-Out for custom van enthusiasts intending to enter his van, The Sea Witch, in a contest. In saving a runaway, Karen (Kate Saylor), from rapist bikers, Clint loses The Sea Witch. He goes to his friend Bosley (Tom Kindle), a rebel designer, who lets Clint and Karen enter his solar-powered laser-firing custom van, Vandora, in place of The Sea Witch.