I hope this isn’t a repeat question, but I’m new here and couldn’t find this documentation anywhere else.

I’m trying to do a poor mans, (and I do mean POOR), conversion on my 69 RS/SS. I read in a JL 8 thread here about some GM documentation that exists detailing how to convert a rear end into a four wheel disk rear. My question is this; where can I get my greasy little hands on that paperwork? What I am looking for specifically is any measurements or drawings of the axle flanges and e-brake brackets, so I can attempt to reproduce them.

I also have some questions about the master cylinder, hold off valve, and proportioning valve. Do I need the valves? I read some where that the hold off valve under the master cylinder is not needed, but I have not heard, or read, anything about the proportioning valve mounted on the sub-frame under the driver’s door.

I managed to get my hands on two right rear Vette brake set ups but I want to be able to use the E-brake when I park, and I especially would like the system to stop the car without swapping ends. I’ve owned this car for over twenty years and I don’t want to loose it now.

Thanks for the help!!!!

Car_Habit

Not sure about the exact paperwork you are refering to, but there is some good information on JL8 in this book.
http://www.camaro-untoldsecrets.com/images/jpg/untold.jpg
http://www.camaro-untoldsecrets.com/welcome_fs.htm

http://www.camaro-untoldsecrets.com/articles/article_fs.htm

http://cgi.ebay.com/Camaro-Untold-Secrets-1967-1969-Wayne-D-Guinn_W0QQitemZ4635378098QQcategoryZ378QQssPageNam eZWD1VQQrdZ1QQcmdZViewItem

Thanks for the post...I have read the articles in this book and found them very informative; however I know I read somewhere else about some actual GM documentation, or directions on modifying a 12 bolt to a JL8 setup. I really need detail drawings, or dimensions for the parking brake bracket, and axle flange. I also need to find out about the brake valves, needed or not? Thanks again.

what brakes are on the car now?http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/th_JL8rearflange.jpg (http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/JL8rearflange.jpg)
http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/th_jl8jpeg9-1-04.jpg (http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/jl8jpeg9-1-04.jpg)
http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/th_JL8sideview.jpg (http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/JL8sideview.jpg)
http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/th_JL8rearview.jpg (http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/JL8rearview.jpg)
http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/th_JL8framebrackets.jpg (http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/JL8framebrackets.jpg)
http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/th_JL8caliperhosebracket.jpg (http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/JL8caliperhosebracket.jpg)
http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/th_rightside.jpg (http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/rightside.jpg)
http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/th_leftside.jpg (http://i45.photobucket.com/albums/f58/markx22/JL8%20pictures/leftside.jpg)

WOW, great stuff, thanks!!!

Are these drawings to scale? I need to get the dimensions of the parking brake bracket so I can attempt to recreate them. If the drawings are to scale I can figure them out.

The car currently has power disk brakes on the front and drum brakes on the rear, just as it left the factory in SS trim. It's a big block with A/C and it has both a hold off valve by the master cylinder, and a proportioning valve on the sub-frame, did you need either of those valves on your car? I found a couple of right rear Corvette caliper brackets and immediately tore the ol' 12 bolt out of the car. Now I can’t drive it until I get the brakes sorted out : (