47-55.1 rear axle choice

[MARTINSR]

So I have this what I thought was a 55-57 passenger car rear end. But I now find that it's a 59, at least the third member, come to think of it, that doesn't mean the housing and axles are 59.

Anyway the date code is A-14-9 January 14, 1959.

The casting number is 725899 but from what I can find there is a 3 buried in the cast and it's a 3725899.

The overall width outer axle flange to outer axle flange where the rim will mount is 59 3/4" and the center to center on the spring perches is 42 1/4."

I am thinking I got this rear from a guy who had it in his truck, but I forget. The spring perch width seems perfect where it ends up on the frame (I have no springs) it looks right on the money. How about the width, what is the width of the stock rear? I plan on running six inch wide wheels pretty much like stock but they will be 5 lug passenger car like wheels.

What is the typical width. It's been so many years, I forget. I had a 64 Nova 10 bolt in it, then a 68 Camaro 12 bolt with an 8" rim as I remember. But the tires also hit the bed on the inside a little.

Brian