1971 340 water pump and crank pulley problem

With manual steering I believe the crank should be single groove. Water pump is usually single groove unless you have AC. Power steering still uses single groove water pump pulley. The alternator should be single groove but the double one should still work fine. I believe you will be using the groove closest to the alternator. I think you have the wrong water pump pulley. What is the height of that pulley?