Rear End

I'm getting close to FINALLY driving this project for the first time..
Is there a way to "check" the rear end to see if it's good to go.. It's an 8 3/4 3.23
and non sure grip...at least I think it's not a sure grip..

Thanks in advance. !

John
You could jack it upin the rear and support it with some good stands and carefully run it a bit.