What kind of rear do I have?

Hi, I’m trying to switch my 5x4 axles To 5x4.5 lug pattern. I think my rear was out of a 71 Dart. Right now it’s in my 67 Dart. I’m not sure what rear I have. Or what spline axels I have. And also what stuff I need to change to 5x4.5. I know Dr Diff has some axles I can use but I need to make sure I purchase the right ones. I have a 276 tag that’s on the rear. Please see all pictures. Thanks


https://www.doctordiff.com/axle-pkg-stock-length-mopar-5x4-1-2-bolt-pattern-pair.html...

What kind of rear do I have?
Author: admin