Wish I had known you earlier so I could have asked for your input. Without having you as a lifeline, I consulted with the manufacturer (aka Rough Country) and they said one would be needed. I had the shop check the alignment after install and it needed to be aligned. Crazy.
Thanks. It is the spacer lift. I also added the shocks to it. Rides just like it did from the factory. I did not do the install myself. Install cost plus alignment was $270.