Ax15 Swap - driveshaft

Finishing up my Ba10 to Ax15 swap. On an 88/4.0/4x4/Mj. New
transmission is from a 98 Xj.

According to the parts list the Ax15-D35 combo has a 50" driveshaft,
and the Ba10-D35 combo has a 50" driveshaft. By all accounts this
shaft should have at LEAST 1" of play on the yoke. But... if you bottom
out the yoke on the TCase this happens at the rear:

I think if I jack the rear up high enough I can force it onto the mount, but
then Im worried that if I hit a large enough bump itll push the shaft up
through the TCase..

I'l be an effort to take this to be cut (because of work schedule) so before I
do does anyone see something I might have missed?

Quote from astape

A ba10 and the ax15 are the same length so the original ds should be fine.

See above pic... its not even close... The only things I changed were adding the
Spicer 5-153x ujoints and the Xj slip yoke. It mounts fine and bottoms out on the
output shaft from the TCase. Theres at least a 2in diffence between the this and
the old setup...

Someone elsewhere mentioned the tailhousing is a different length past 97, but
I cannot find any documentation to confirm that. Theres only one place down here
to shorten a shaft so I will probably need to take two days off of work to fix this...

Apparently in 96 they switched to an external slip yoke on the
NP231s. The yoke itself is the same length, but no longer
recesses into the tailhousing like before. General consenus
on the other sites is that is where i lost the lenght...

Driveshaft needs to be cut...