I have one of these in my inventory. Attached are some photos of it that I took today. It appears to be very original and never messed with. Case is dated 7M21 and it has its original C8ZX ID tag with a date of 8AC. Internals are clean, assembly rotates smoothly and I have checked the ratio and confirmed it is 3:89. I have yet to put an axle into it to confirm 31 spline but I can do that in the next day or two.
Josh, if you have interest please contact me and I can provide additional photos. Email is best.
Bill Collins
Harrisburg, PA
717-648-6600
bill@bcfords.com