If you can run with a single shaft, do it.Using those split drive shafts are just another problem, especially if you have some real horse power. I snapped 2 of them in my 59 Impala, not counting all the steady bearings and U-joints, I kept haveing to replace.Yes the driver was some what to blame, but hey, I didn't have that much problem when I drove a 57 Chevy.Mind you 59 Impala's are mechanically just a pile of crap any way.Any one that owns one of those simply don't know about which vehicle to buy . It was one of my first cars,it was only 10 years old when I had it and it was in mint original condition.