Sure grip questions

Seriously? That makes no sense for Chrysler to have to cast two different housings for what purpose? A small housing that accepts one, maybe two, gear ratios and then you need a bigger one for the others? If that's true I wish the guy that sold me this rear would have spoken up. I was talking all about my plans to him several times before I got it from him. I also found a 3.21 sure-grip in a van right next to the Magnum that felt tighter I had actually decided on instead so as to do only one gear swap for a kind of happy medium between 2.45 and 3.55. My OD swap is pointless now unless I put @#$%ing go kart tires on the rear! :mumum: That really pisses me off now...