Nothing bad at all,,,, alot of people take the easy rout of spacers and key... you have to remember that with keys you are cranking the torsion bars tight and yields a stiffer ride in the front... there are 2 types of spacers.. eurothen and metal. the metal ones transfer more road vibrations.. i prefer eurothen..
my trailmaster lift has spindles and drop cross member... along with a hole slew of stuff but it is a $1,800 kit.. id look at some of the kits out there for your vehicle and piece it together very easily..
spindles are great. they are relatively easy to install 2 out of 5 dificulty..
i would recommend getting longer front tortion bar end-links. longer shocks, ebay you can find the 4 and 6" skyjacker rear springs for cheap. you will have a slightly greater drive angle but nothing major..
i have done spindles a couple of times and fully support them..
pm for more questions if needed