i called a local shop and he told me that it would cost 300$ or so for labor and the kit + the cost of the gears if they dont come in a kit for the 3.73's he had also asked me if it was a one wheel wonder and had asked me if possible do i want to make it a posi for a little more let me know what you think. i think its a good deal. and is it a good deal to make this rear end a posi i have a 96 z28 with the lt1 also the gu2 package which i believe is 3.23's stock please correct me if i am wrong any input needed asap need to get it in the shop soon thanks_sean

 

your car should already have posi, or a LSD