I don't know if this has been posted here or not but please feel free to add it to the appropriate thread or forum. It's not all the numbers and combos but it's enough to get most of us what we want. The challenge is to find the applications they were used. I just started looking into this so I'm hoping to find more info later. http://www.chevelles.com/forums/18-engine/327577-gm-hei-centerplate-degree-timing-values.html
