The 7.5" kit is a stretched 5" kit so you def want UCAs! I don't think the kit supports autoride but you can make it work. The front will need some custom wire extensions for the magnetic ride shocks to make up the difference in the top strut spacer. The front also requires cutting the bump stops off the UCA frame brackets. The rears will work fine but need ride height rod spacers from FTS to work. The downside I didn't like with this kit like the FTS rear is no longer trailing arms or drop brackets. The lack of longer trailing arms or drop brackets swings the axle forward in the fender.
I do like the McGaughys lift since it supports autoride, denali, and has rear drop brackets for trailing arms. I was debating the FTS 7" and McGaughys 7" for mine. I got a better price on the FTS but now might have gone with the McGaughys. I ended up doing FTS up front and Fabtech rear which I am pleased with now. Just some info for all interested in lifts on Tahoes/Yukons.
I read up a lot on your set up. I just don't know if I want to go that far under the knife. A 4-5'' would be perfect for what I want. I just am not sure why I can't just buy a RC kit for a Tahoe and it won't work, nobody really has an answer. Is it the AWD? Because you and I have talked about the autoride issue's a lot....and they are fixable but I don't wanna shell out like $3k for a MG or FTS plus wheels and tires.