2.71 SG 8 3/4 Exsist?

I've got a 742 with 2.76 gears and the clutch style sure grip sitting in my
garage. It was sold to me as a 3.23 and had an old cut off center section
bolted to it. I was to lazy to check it until a year and a half later when I
finally got around to installing it. Now I've got a 3.55 3rd member for it
except the concrete on the garage floor is too cold for my old bones.