I just installed one I purchased from John at Mopar Madness, works perfect. Super nice guy, been doing these for 42 years. I'm sure he would help you if he could. His number is in the ebay ad.
Mopar 8.75 8 3/4 3.23,.55 3.73 3.91 4.10 489 ALL NEW third member Dodge add Posi | eBay