I'm also gonna have to disagree. BL should not affect the placement of the rear of the t-case, crossmember, or the placement of the rear axle. Flipping the crossmember with a BL would be much easier though.

Most shops will probably reuse your original slip yoke and the u-joints at either end.

Its a simple swap. 10 bolts to take the old one out, 8 bolts to put the new one in. A tube of grease and a can of spraypaint are the only other things you'll need. One more thing, don't make the mistake I did and fill the slip yoke with grease before intalling driveshaft. When putting the shaft in, you'll probably have to compress the slip yoke and all that fresh grease just squeezes out on your noggin.

-chris