I never got to see Spinach at Whiteman, it was locked away the only time I flew in there many years ago, but I've got a book - Antique Airplanes by Chris Sorensen, which has a chapter devoted to her, you might've seen it. Anyway, good luck with her, must be the most famous Porterfield of the lot.
Welcome to the Porterfield Airplane Club. I hope we can all help each other with our airplane problems. I don't know what the cables should be rigged to. I looked through all of my literature and have not found anything about flight control rigging. You might contact Joe Rankin and see if he can help you. His contact information can be found in the "Notes" section.