I'm said blazer!
I put the 2.5" lift on my blazer my self. I am having a issue with the drivers CV boot. I had the issue prior to the lift so RC is not to blame. As for wheels, I put a set of Z28 Camaro rims on before the lift. The back spacing was 4.5" so I had no control arm issues. I did hear of a Zed that had control arm issues. I also didn't go full crank on the T-bars. (good choice in my opinion). 1/2" less than RC recommended.
Here is the info;viewtopic.php?f=15&t=8807
If you have any more questions I will do my best to answer them. I have had a lot of help from the gentlemen on here and will pay it forward as much as I can.