SBM March Crank Pulley 10051

No idea what water pump pulleys line up, depends on your damper also I believe. March Pulley website might have the measurements for this pulley, I do know March Pulley sells water pump pulleys as well to go with these but I used stock Mopar

The first groove is 1 1/2 inches and to the 2nd groove its 2 1/2 inches. That is from the back of the pulley to the center of each groove.