Thanks for the input from all of you.
The diff in question has the gears I want and it's
from a good known Mopar speed shop, so I thought it should be ok.
Also I want to use this for autoX and some SoloII racing no drag racing, maybe it's not the right Suregrip for my use? I am not to sure of the difference between the different styles Suregrips out there.
Here is the listing for it, if that helps the decision.
Thanks.

Almost new center section - 20 miles on gear set.

Gear set is good but has gear noise. We had our manufacturer go back thru the assembly and there is nothing wrong with the center section.

All parts are brand new except for case. Includes US Gear Ring & Pinion, Auburn posi, Timken bearings and races, Mopar 7290 strap type yoke.