Tricky I got the measurements off the rearend for you

It measures 46 1/2" from end of axle tube to end of axle tube. The gear ratio tag is gone but I think it has 410 or 411s in it.

Thanks dude. You said that you wanted $500 for it, right?

Thats a big 10-4....let me know if you want it and I will go take it out from under the truck. L8R

Is it the one that is under your truck?

No, it is under a Box Truck that is behind the shop.