Question about pulleys

Hi everyone, just after some advice regarding pulleys on my 383. I purchased the engine with no accessories, so when came time to buy an alternator, i bought one with the single pulley, so the original water pump pulley will not work. So i borrowed another water pump pulley from a friend that is supposedly to suit an engine with no a/c or p/s, but as you can see in the pic, the outer diameter is too big and i cant fit it to the water pump because it's hitting on the crank pulleys. So just want to know what my options are here, are smaller crank pulleys available? Is there another water pump pulley that will work?
Appreciate all advice thanks!

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