Did my 7.25 take a crap?

Thanks for all the replies. Before I ran out of light, I had a friend get in and put in gear while I looked underneath (car on the ground and brakes ON). When it is put in gear, the driveshaft starts to move slightly but stops immediately (not even a 1/4 rotation). Once it stops, that's when the noise kicks in. I paid special attention to the noise and it's location: definitely aft of the trans.

Curious, I went and performed the same experiment on my Dakota. Same thing: Once the trans was put in gear, there was a very slight movement to the driveshaft. Albeit with no noise like the Valiant.

Again, I appreciate everyone's input. Is my next step to replace the u-joints?