There was a whole lot more than 200, seeing that the database has more than 200 of them in it! Over 100 of those have docs. That 200 number is for J65, http://www.camaros.org/suspen.shtml#Brakes
Not a total SWAG, but looking only at documented ones versus the rest of the documented population came out to a little more than 3%, so maybe 3000-6000?
Thanks for the data!
Nope, metallic pads wouldn't have affected the codes. But J56 was only available on Z28's.
There's a difference between having data on the vehicle and having actual data on components. I personally don't watch 67's that much, never noticed the difference.
If you don't know what I mean when I post something, just ask.
I've finished the editing of the page (and did a bunch of other changes). Should be online soon.