well we all know about underdrive pulleys

but would a overdrive pulley blow up our motor? lol

EDIT i say this cuz im lookin up stuff for the s/c

 

over drive will rob you a bit more power and will make the water pump/alternator/power steering spin faster putting a bit more strain on the bearings of these components,what could also happen is the water pump by turning too fast could "cavitate" creating air bubble in the cooling system

in your case,since the SC will work only on one "portion" of the crank pulley i'd do a custom one...
lets say stock diameter for the accesories and a larger diameter for the A/C and SC,it's not like you'll be racing with the A/C on ;-)

 

nah im takin the a/c out anyways its been dead lol

so stock size for the alternator

and a larger one for the S/C?

ya wanna make me a custom one lol