Burb driveshaft too short after lift

[texassquarebodies]

This is my first time dealing with a 4wd, let alone a lift. Always been a lowered two wheel guy. I have a 1988 3/4 4x4 burb. I bought a Rough country 6" lift after a month of owning it. After the lift, the rear driveshaft looks like its about too fall out. It sticks out about 2-3" more. My transfer case has not been dropped yet, but my buddy said it might mess up my front drive shaft angles???

The rear blocks are sloped towards the front of the burb. The instructions said nothing about needing a longer driveshaft. Ive got about 20 driveshafts to choose from so I might go that way. Ideas??????