This 10 bolt has 30 spline bolt in axel's and 3.08 open pig.Can any one tell me of any unseen issue's of up grading to limited slip with this current diff case.Came out of 1971 buick gs.Have plan's of installing in 66 mino.

The 71 Rear is One Inch wider than a 64-67 Rear. I recommend looking for a 64-67 Rear because if you are looking to stuff big tires under the rear, you will have clearance issues.

Will work fine. Just remember that you need BOP 10 bolt parts not Chevy 10 bolt parts...BIG DIFFERENCE...

Not necessarily..make sure you verify if it's a Chevy rear or a Type O (Oldsmobile) rear first.