Question about pulleys

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ozmoparjoe

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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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More than likely you have a SB water pump pulley. And your 4 groove lower pulley is one for AC ,PS. See if the WP pilley has a part number on it.
 
I have a small diameter 383 water pump pulley. It is for an ac car I think.
 
The second pulley also looks like an early pulley. 64-66 ?
 
The guys ae correct . the w.p. pulley in top pic is a small block A./C pulley . the crank pulley in the bottom pic is for b.b. with A/C/ . No go ! you need a matched set . the crank pulley diameter must be the same as the water pump pulley . The triangle and alternator brace must be the correct one also . If you attempt to cobble it up only leads to frustration . good luck
 
I like the water pump pulley to be smaller than the crank pulley so the engine cools better at idle. This depends on your engine and what your goals are, of course. Just another option if you have trouble staying cool at stoplights.
 
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There is atleast 5 or 6 different sizes of big block w/p pulleys. How do I know u ask? See pics. These are all different sizes. 6 1/8 to 7 1/4. I just found them in my storage. The depth is 2.75 inches. These smaller 1s are very hard to find. Kim

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