If you are able to tighten the 4 nuts as required and there is not a gap between the drive unit and the tube, you are good. You can try spinning the driveline to see if it spins freely...remove the drive flange from the wheel and insert it in the drive unit. If you dropped your rear end off the shocks, you will want to rise it a little so you don't put your u-joint in a bind (the shocks don't allow the axle to drop far enough for it to get in a bind normally).
Joe
I did lift the axel house and tie it up before I pushed the axel in...
But , as you said, I'll spin the wheel etc before lowering it from the jack..