Roadracers

I just caught the last 15 minutes of this obscure "drive in" era film on AMC on March 17th. I am interested in auto racing films and never even heard of this one. It seemed to have a basic plot and acting, but the racing scene at the end was truly wonderful. It included the classic era cars like Scarabs and '58 Vettes in a well filmed race. Black and White but AMC had a clear print. I must see it again and buy it if ever released.