looks like a good kit & the price is good too , I get the same kit here for $145 can
the Factroy service manual covers rebuilding them , you need 2 different types of snap ring pliers & some patience but really not too hard to do , , you will need some way to load the countershaft with the 72 needle brgs inside , I have used heater hose in a pinch , Mopar does sell the miller tool or if the counter shaft is worn you can have it cut down to work