[Zappa's 68]

I purchased all the components for replacing the timing chain cover and converting to an 11 bolt water pump from the 8 bolt style. (68 GTO 400). Side note, just got the motor back and it dyno'd at 356 HP and 455 ft. lbs. of torque....man I can't wait to get it back in the car....but I digress. The water pump pulley that was required interferes with the crank pulley. They are both 8" diameter. It's an AC and power steering car......What do I need to do.....is there a smaller pulley for either the water pump or crank....