How would you route one belt around 4 pulleys in a way that would have the belt wrap 90 degrees or more around the water pump pulley? I just can't see it... it is not a serpentine belt.
I can take pix of my sons 'cuda with those driven items: alt, WP and AC. We used a multigroove CF Racing crank pulley, and used a 2nd belt for the AC alone. It is an aluminum pulley, if that is OK with you.