Transmission / Axle Combo?

When you say full lockers, are we talking air, if so and you are getting the whole setup, then that is a good price. If you are talking detroit lockers, you wouldn't want a locker in both and they could be an older set up too.
I would want a little longer legged than those 488's myself.
13, with 370, and tall rubber, should put you around 1500 rpm at 65.
I am not sure what tranny you have though, if high gear is against the dash.

 

The add doesn't say, but surely they are air lockers, as they are available on that model.
I would hope you could get by without full rebuilds, but who knows. One word of caution, anytime you pull the axle on the locker side of these, you have to lock the locker in before you pull it, or the lock ring will fall and you have to pull the pumpkin to get it back in. Either rig up an air hose to keep it locked, or there is a bolt in it that you can manually lock it in with.