Never paid attention to the set up. Is it spring loaded to lean to it's max angle? If so, my guess is that you will increase the pitch of the angle by about 10%. So if your bike sits at say 285 it will sit at 295.
Hey misguided you could either run a Hugger kickstand or if you are not running the HD lowering kit (that includes a kickstand) you can order just the kickstand from that kit. As for a shim I haven't seen one for a XL, only for a Softail.