slant 6 engines

Ok, here lately I have been getting into a lot of slant 6 engines. I have picked up 3 1966 Valiants all with / 6 "s in them, I have a 69 with a /6 and I have a 76 with a /6. Is there a book or a manual that you would recommend that tells all about this engine. Specs, numbers and all that stuff. I have seen a couple but want the best one. I need to read up.thanks in advance.