Art,
That's as complete a library on Cobras I've seen anywhere. I browsed through it today to see whether I could find a book or magazine article to add to the dragonsnakes-only list at
http://www.dragonsnakes.com/library.html
I'm in the process of adding "Super Stock - 10/65" (Costilow & Larson) and "Hi-Performance Cars - 1/67" (Joel Rosen and Harr Ford 289), but haven't found anything on Ed Hedrick or the King Cobra.
If anyone knows of a magazine article on independent drag Cobras (other than the two magazines above), please email me. I appreciate all the help I can get.
Hal