Since I'm using a whole driveshaft from another vehicle, and it's not being cut or modified I would assume it's already balanced.
That being said, I know what can happen when you "assume", so having it rebalanced is a good idea. The same goes when acquiring a junkyard shaft. Just good sense. Adding a loop is also a good idea when utilizing a long shaft, and I intend to do that as well.
Thanks to all for some good input. Safety First!
