The th350 and 465 205’s use different case input shafts and transmission output shafts as well. 10 spline course input and output on the 465 and 27 spline fine on the 350 if memory serves me. I believe there is a conversion coupler made that will make this swap work….
Here’s said coupler…
https://www.offroaddesign.com/drive-...10-spline.html