Rancho Vs Fabtech Shocks

[DwelveAT]

Question to any shock gurus out there. I recently purchased my lift kit a few weeks ago and of course havent had a chance to have everything installed yet. The kit I purchased was your basic 6" Fabtech system which includes those performance shocks which from what ive read on this site and others they blow donkey d**ks. My truck has the All Terrain package which everyone knows comes with Rancho shocks. Does anyone know right off hand which type of series they are? I was able to find some little information which led me to believe they would be the RS5000 series; which if they are, based off what ive read on Rancho's site, they state they can be applied to normal or lifted applications on vehicles. Does anyone know if they can be utilized inplace of the rear Fabtech ones? I know Fabtech states in their disclaimer about mixing different parts which could void any type of warranty, but I was just curious to know if someone may provide some insight on the matter on whether it can be performed or not.