This chevy truck axle is a good replace for my blazer rear axle?

[masaki]

Hi, I have a 1973 GMC Jimmy 4x4 for a restore project, but, the rear axle is not the original, (the old owner replaced the axle with another model with 5 nuts in the wheel) now I want to replace this with another axle, because I want to activate the 4x4 option in the blazer, after some search here, I found a chevrolet truck, it's for sale, I want to know if I can use the rear axle, I want to know if this axle is the same model of the blazer o GMC jimmy 1973

here is the truck... (all I know is: this is a 69 truck, 2WD, L6 250 engine, suspension: front coils rear leaf)