You know the question will be asked.....
If its only the heads, water pump and radiator lowers when do you think the option will be available on non 2014 models?
Good question. Maybe it will be offered, and maybe not.
Since the '14 Touring bikes are finally CANBUS now, it might not even be technically possible. CANBUS changes the entire electrical control system. I would assume the ECM is in control of, or at least aware of, the water pump and water temp... but maybe it's a self-contained system that works independently of the ECM through a simple thermostat.
I wouldn't be at all surprised if there is logic in the CANBUS ECM to use head temp, and perhaps water temp, in the AFV calculations for the Twin-Cooled Models... but who knows?
I doubt the MoCo would go back to update J1850 ECMs to add Stanley Steamer support for older bikes... They don't have a very good track record for doing this sort of thing. They would MUCH rather you just buy a NEW Steamer!
Ken