I have one from an s30 with 3.54’s and MIGHT have one from a z31 with 3.90’s that whined(may have been scrapped). The s30 one I took the output shafts, cover, and input flange when I put an LSD in my '77, but it appears to be in great shape otherwise. I also have an r180 that was good too, came out of my '77.