Tire Diameter and ride height question

[Jferrante]

All right everyone please pardon my ignorance here but I have what I believe is a potentially stupid question...
I am currently running 275-60-15 all around on my 64 C10 with airbags. My front tires rub wayyy to much on full turn when the truck is lowered (i actuallly popped one) so I am thinking of going to a 225-60-15 up front which would be ~2" less in total diameter.
My question is, will the smaller tire lower my front ride height by the ~2"? If so will this have a similar effect a rear lowering block has -allowing me to run higher psi in the front bags at a lower height to improve ride quality???
Is my logic sound or am I completely off?
Thanks again