Chevy SM465 long output shaft fine spline to a NP205 fine spline input adapter/mount. Last one I have, not damaged, not repaired. These are often broken. These will mount to a separate cross member between the transmission and the transfer case. If you build a doubler transfer case, (NP205/NP203 range box), and use an SM465 Transmission, you can install 3 cross members to really beef up the set up and not break it.
Selling many of my project materials, due to health. All prices OBO, but don't be silly about it. Text is best. I don't answer texts, "Is this still available" due to scammers and phishers. If your area code is NOT 505 or 575, don't text, call. Leave message I will call you back.