Davie: Franco would not make the credits because he was used as an extra (SEG). He was paid scale for a day's shooting and a box lunch thrown in. Of course all this would apply if the movie was made in the U.S. and under union agreement. Franco had made a few low budget movies himself. Mostly shown in small towns and any drive-in's that are still in business. Diffent second features. The southern part of America seems to be a good market for those cheaply made flicks.
There are a whole series of books on Conan adventures, written in the 1930's. From a child to an old man, if I remember right. They were written by Robert E Howard (lived in Texas all his life), who committed suicide when he was 30. A good part of those Conan books were based of old Celtic/Keltic myth's and stories. Howard also wrote the Kull stories and Red Sonja (spelled wrong?). I read most of the Conan and some of the Kull books when about 13 or 14 years old. But there a good read at any age. Adventure, mystic and mythology stuff, read with a open mind. Good Luck.