A VP prop is a big help here, if you pull the blue knob all the way out a 182 will glide a LOT farther than a 172
I though in most VP aircraft oil pressure was used to take the prop to the coarse position, with the springs taking it to full fine - if the engine fails won't your oil pressure disappear and thus the prop go fine regardless, or is the windmilling prop turning the engine going to produce enough pressure?