driveshaft after universal joints replaced - vibration around 60-70 mph

[Will_K]

So I completed a replacement of my universal joints which ended up being a replacement of the driveshaft with the new universal joints going into another used drive shaft from a 2006. After that, I am getting a low frequency vibration between 60-70 MPH. I think it's gotten quieter. Looking to see opinions - is it normal and will it wear in? Or do I need to look into balancing the drive shaft. Or maybe I got one of the yokes flipped 180 degrees?

 

[tommudd]

Not normal
No on the wear in
bent driveshaft
may have gotten one flipped or a u joint that completely in right