For the record, the shaft in my Valiant was cut and rebalanced by a driveline shop.

However, I've seen a ton of Mopars (mostly 4 speeds) toss the factory driveshaft through the floor in the traps. That's right, all original Ma Mopar driveshafts will break too. The balance job on many of them was nothing to write home about when they were new.

Would I cut my own now? Sure. But, I also have access to a lathe and mig welder now.