Gone but never forgetten
Join Date: Jul 2000
Location: Roseville, California
I have '70 brakes in both my '66 and my '69. In the '69, however, I'm using the '69 distribution block and "torpedo" proportioning valve (with all it's billions of lines).
On the '66, I used the '70 combo valve. I drilled an extra hole and have it mounted upside down, but horizontal. This way, all the existing '66 hard lines hooked right up to it, with the help of one adapter.
On the flex lines, I used the Russell steel braided lines. They'll last longer than the stock rubber lines, and they cost less (for some bizzare reason). I used the brackets that came with the Rusell lines on the '69, because the drum brake brackets wouldn't work with the disk brakes. The drum brake brackets on the '66, however, worked fine with the '70 disk brakes. The '69 manual brake lines needed a fitting to attach to the '70 flex lines, but the '66 manual brake lines didn't.
It was odd to me that the '70 disk brake hardware is more compatible with the '66 manual brakes than it is the '69 manual brakes.
Doubt any of that helps you, but figured I'd throw it out there.