Cherokee 8.25 to 64 Dart?

Narrowing a cherokee 8.25 to use A body 8.25 axles seems like a lot of work. If you have A body 8.25 axles they probably are in an A body housing. If you just want the posi and good gears out of a cherokee just transfer that stuff into the A body.
The 8.25 spline count changed somewhere in 1996 they went to 29 spline before that they were 27 spline.