Quote:

I think 8 1/4"

8 3/4 wasn't available to A bodies since 73. I think 8 1/4 was the bigger



Look at the rear of your car if there are bolts on the housing then it's either a 7 1/4 or 8 1/4. The 8 1/4 is more oval looking. If it's smooth and half a hemisphere it's an 8 3/4. I don't believe they're all the same width.

Reference:

8391188-axle.jpg (32 downloads)