Even though the car came with a 318, it has all the Rallye equipment so it has the 8 3/4 rear end.
The stock gears were a peg leg 2.76. I had a good 3.23 sure grip center section just sitting around so I cleaned it up and installed a new pinion seal. I also re-used the 2.76 gear ratio tag.
Here is a "before" picture. I had the housing sand blasted but didn't get it finished right away so it rusted again.