Dale you're going to love that tranny!
Call Jim Goodlad @ Hurst Tech, he's the previous owner of the original company and a great guy. He should be able to give good honest guidance on the clutch master. He also own's a '69 Z28.
I don't have any trans lock-out connected and the column lock still functions. Here's a pic that shows the position of mine (original automatic car) in a position that works........at least when I shut the ignition down when the fire erupted I could still steer!
http://photos.smugmug.com/photos/i-X...XSjWZSK-X2.jpg