This is a used SM465 to NP208 transfer case adapter. Very good condition with casting number 15597793. Looks great. Most likely fits more than what I have listed especially if you are mixing and matching parts, but GM dealership catalog states it came from 85-91 Square body 4x4's.
If you have any questions my contact info is on my store page.
Please note that I have a full time job monday through friday 8-6, that does not involve selling parts on ebay. I try to reserve all of my packing and shipping for the weekends. So if you purchase something from me from Sunday to Friday, I will not ship it until the following weekend. My storage is a 50 mile round trip from my house so I only try to go there once a week. If you are in an obnoxious hurry for something please do us both a favor and keep shopping. If you can patiently wait for good quality parts I will welcome your business.