Identify this 8 3/4

What is the width?

I would say it's a truck rear end, which would make it a tough fit even in a duster without cutting it down. Even the A100 axles were 61 3/4", which is still quite a bit wider than the 68-70 B-body 8 3/4 I'm running in my Duster. It's 60 1/8", and I use rims with a 38mm offset already.