Just remove the driveshaft, better safe than sorry.  I don't
personally know if a Muncie will be adequately lubed without the input
shaft turning, but unless there's something really wrong with the car
dropping the shaft should take 15 minutes tops.

nate

Towing the car on a trailer with your truck is the best option.
However, If your friend uses the Xterra, I still believe it is better
to use a full car trailer with surge brakes. While it is true the
trailer will add to the total weight, the extra braking provided by
trailer brakes will make pulling the vehicle a lot safer. I assume the
Xterra is rated to tow 5000 lbs and has a class III hitch. U-Haul
lists the weight of their car carrier as 2000 lbs and the Chevy will
be around 3000 lbs, so the combination will be pushing the maximum for
the Xterra. However, I suspect if you weigh the trailer, it will
actually weigh less than 2000 lbs. I've rented a U-Haul Car Carrier
twice in the last year and been pleased. Just make sure you get a good
one.

I've also towed cars on the dollies, but don't like them. Towing a car
for a short distance with one is OK, but I'd hate to tow one hundreds
of miles at high speeds that way. U-Haul lists the weight of the Tow
Dolly as 650 lbs. So the car and the dolly will approach 4,000 lbs.
4,0000 lbs without trailer brakes might be a little more than you want
to try to stop in an emergency.

Ed