s-10 f-body g-body

Without getting into the good rears I want to know more about the stock g-body rears and what else used 26 spline Axel's my 78 Cutlass has a stock rear with 2.56 gears I have a posi unit in my shed with 4.10 gears out of an S-10 will it work with like 3.23s I know it's a stage3 so that's the...