I'm fortunate enough to have saved some good stuff from when it was readily available. One of the few advantages to being an old fart! One of the three is installed in my car. The other is prepped for installation in one of my cars and the third is just a spare I'm hangin' on to for a future project. (post retirement dream....) That one still needs a posi unit and some reasonable gears though.
But I'm still wondering why the accepted chart shows 57-1/8 as the overall width and all of mine are 58-1/2"