[DAVID GAGNARD]

Kevin:

a good rule of thumb is to have the water pump pulley 1 to 1.5 inches in diameter SMALLER than the crank pulley, that way your overdriving the water pump....

For a 6 3/4in. crank pulley, to get 15% overdrive, you would need a 5 3/4in, water pump pulley.........

The alternator pullley is the small one and with a 6 3/4 in crank pulley, you will not have to worry about the alternator......

David