My buddy ask me to find him a factory eaton limted slip, locker, posi, spool whatever for his '91 S Blazer. It has gm 7.625 rear with 28 spline shafts. I keep telling him to do a solid axle conversion in the front but he is concern about the axle sticking off to far. What axle is he better off going with. He keeps thinking dana 30 from a Jeep. Any ideas.