Easiest (?) would be a jackshaft as Pappy suggested but the idea of incorporating it into the snout extension has some merit as well. It would be clean there. Another way would be to simply have a switch, AK "Road Warrior" style. Switching the blower on and off at the correct times to make a smooth transfer would be the ticket in my eyes. I'm using a carb base as my bypass valve, it's larger than the Mustang's and should support just about all normal driving conditions (HA!, like my foot's going to let that happen). The compressor's pulley is too large and it will be a trick to get it down to size. Just details.
