Well, I aquired a "SLR Diff Lowering Kit" second hand from another member in my slow aquisition of lift parts. For anyone who wants to know, here is what it is:

It came in an Energy Suspension box with this on the label:

7.1111G Front Diff Carrier Bushin

It consists of the following:

Bushing Halves with the numbers on them in (this quantity):
  • 1163 (x1)
  • 1164 (x4)
  • 1165 (x1)
  • 1166 (x1)
  • 1169 (x1)

Metal sleeves* (in this quantity):
  • 2-11/16" x 1" x 1/4" (x3)
  • 1-7/8" x 1" x 1/4" (x1)

*these are to my best measurement
Of course, the holes are offset in the bushings.