Does anyone have an early LSD from an 83-85 (not 85.5)? Needs to have good torque tube and splines.   mm

last night I went to the local pedestrian drags at my local speed way, it was too much fun. Anybody run there cars on the track. I wanted to get some advice and some upgrades. no slicks allowed. no interior stripping. cars must be registered inspected and street legal.   the track is a 1/4 mile oval. one lap per round. its all about the launxh.

26bucks shipped..........can u mail pics.........

Seems my torque tube. Seems to have more then necessary play. Might need to get one in good shape. Any other options? Can it be rebuilt?