would that also fit into a 98, and would it happen to be a 3.55 gear ratio, as that is what is in my truck and i would like to leave it so as to not need recalibration, and if both are yes then how much would you want?

 

and while we are on the topic would this (http://www.performanceproducts.com/p...B+Air+LockersB) be a good thing to invest in, or would i just be wasting money buying it, just looking into it bc im thinking that my truck does not have a posi in it