The older bars are Alston, from the 80's.
And I have a question for you guys. These axle brackets are full wrap, 1/4" thick. They seem to be more like four link brackets than ladder bar brackets, meaning ladder bar brackets are normally a half shell mount. Does anyone see any problem if I either cut a notch out of the back or just cut them in half, install and weld everything back in place on the rear? The only other choice would be to but a housing with loose ends and install the brackets first. I would prefer to get a housing with the ends welded in place already, but I realize that might not be an option.