The only obstacle I can see with the Revolution is how do you get the displacement you're looking for on a Road Glide in the same space you have a V-Twin now while keeping the tank where it is? I'm not sure where the V-Rod is at but I'll take a stab and say you need 20% more? How do you obtain that without an increase in size of both the engine and the cooling system? There just doesn't seem to be that much room to spare.