Most salvage yards have the cars off the ground some with tires removed, with everything in neutral turn one of the brake drums (tires if still on), if the other side turns the same direction it has limited slip, if it turns the opposite direction it's open or a wore out minted slip.

Dennis


95 Sportage, gone but not forgotten.
98 Jeep TJ, 4" Zone springs with RC Long arms, Ford 8.8", 4.56 gears & Detroit locker rear, D30, 4.56 & Detroit Trutrack front.