I just got my car running last week and have started riding it to break in the motor before i ever take it to the track. Before i take it I am going to change my rear gear, my car (a 1986 IROC-Z) currently has a 2.83 posi in it, and i really want to change it to a 3.73. If i get this richmond ring and pinion set should this be all i need, the kit is Jegs part #836-49-0007-1
Ratio: 3.73, 2-Series
Teeth: 41-11 I just want to make sure this is all i will need to order before i get it and make sure it keeps the posi, this is the first time i have ever changed a rear end. Thanks for any help.