Is it safe to run the truck with the driveline out?

[Leviticus]

Hey guys,

Here is a question that I don't know the answer to because I have never thought about doing it before. I just pulled the driveline out of my 72 C10 with the 350/TH350 to replace the carrier bearing due to the rubber being blown out, and figured I throw some new U joints on.

I have been trying to track down a whine/humming noise under light throttle and was wondering if it is safe to run it in gear up to about 1500 RPM with the driveline pulled to see if the noise is the DL or if it is in the trans?

I know we have done it with our offroad rigs after breaking a rear, we would drive out with only a front, but this was just cause we had to.

Maybe a stupid question, just have never done it.

Thanks guys!