COPO Anders, I do not think I ever said whether your car came with a 10 or 12 bolt rear end as my documentation does not show that, you must look in the parts book and use the axle ID to see what is correct. Regarding the GV or GY not really defending myself, just curious what was written, whether it was by me or someone else. Lots of documentation floating around that has been done by other people in the 'old days' and if I made a mistake would like to catch it. I am always willing to re-check what I have done as in life I have learned I am not perfect, but do my best.