Winston for a '77 again you're most likely looking at an offset rear axle. You want the front only in that case.

Like I've mentioned to you a couple of times now, only '80 and newer are centered. Even Waggies which had the centered tcase had an offset rear axle to keep the driveshaft from hitting the gas tank.

Where in CA are you? I see guys from the Pirate board (mostly CA) all the time getting cheap, complete axles from the pick n pull junkyards.