If it has the 8.75 rear I May be interested in both axles if your willing to part them from the assembly... well also depending on your asking price and willingness to Greyhound them to Upstate NY.
Additional info as I found there is some conflicting info... needed are axles 31-21/64" (measured from the splined end to outside flange) which are found in 70-73 Cbody cars or 69 Cbody Wagons and apparently 71-73 Bbody wagons