It's possible. Pop the cover & check. If it is, get the whole rear end & drop it in. My rear end cane out of a 79 el camino (same thing) All Gbody rear ends are interchangable, it's just kinda hard to find a posi. Around here, el camino's seem more likely to have posi. All Gbody have the 10 bolt 7.5/7.625 rear end except 84 & newer Turbo regal, GN, 442, Hurst...they had 8.5 10 bolt.