Is it possible to move OEM front brake calipers to the back?

 

I'm sure you COULD do it, it would be a matter of fabricating an adapter bracket from the mount to the caliper. The rotor is the same size, so no problem there. You'll have no emergency brake, so you might just as well switch to one of the racing calipers like a Wilwood that doesn't have a brake, but for which someone has already fabbed a bracket...