I know i'm going to see some stupid comment from marshall..

But if I were looking to stay SR/KA, i'd see about using one of the gm pcms used for the ls family, there are plenty of readily available variables that could easily be used for this, within them, the fan control is already taken care of also.

Just not sure how much trouble it would be as far as getting the pcm to work with the SR's CAS, or reworking the mechanical assembly to use sensors from gm stuff.