Changing shocks you’ll have to get the evo link as well. My RP2 has been push tuned and it is one of the plushest tune/shocks I’ve ridden, highly recommended.
Vikingboy put a CCDB coil out the back of his S-works, but broke two machined eyelets, the problem is that the tolerances on the clevis links aren’t great so you need to machine the eyelet specific for that bikes clevis link.
I know of a couple of guys, one french, one american who have put CCDB airs on their enduro’s by machining the eyelet out themselves, details here:
http://www.pinkbike.com/forum/listcomments/?threadid=145462&pagenum=3
It is possible, but personally I’d get your stock RP2 push tuned by TF, and maybe go for a slick (black) coating while your at it as well.